Heart piercing for months?

I have had sudden 'heart piercing' on the left side of my chest since December (where my grandfather died). I can't really describe it but it is extremely unpleasant. Since I moved, I do not get here so quickly an appointment with a medical practitioner, as they all no longer accept new patients. Lately, it's more common (every 3-5 days), especially when I'm lying quietly in bed or sitting in front of the laptop. I do not know who to contact, because that worries me. Can it be due to mental or stress? Once I even had a tingling in my arms and fingers - heart attack? I'm confused. Did somebody have such symptoms?

Next time you have something like that, you call the 112 and describe the current symptoms.

You should have done that for a long time! Like all who have such symptoms!
They send you an ambulance with ECG, let it run accordingly and immediately make the first diagnosis. If she's in favor of taking you, it's the highest railroad.

If you really have something on your mind, you can topple over dead next time.

The risk would definitely be too big for me.

And if they say: Take it is not enough, then you have this statement and you first have to make a head and can tackle the matter with your family doctor for a long time.
Again: For potentially life-threatening symptoms you do not ask on the Internet, but immediately calls the ambulance. He asks the necessary questions and then decides on the basis of his diagnosis.

That makes no sense

. Is nothing acute and not life threatening

The questioner has been weeks! Complaints. If it were something life-threatening, he would be dead or long gone to the doctor because he could not handle it. The rescue service is not there to clarify chronic complaints and in addition also not qualified and equipped. (Lab is missing, imaging is missing, etc.) Here is the only right contact person the family doctor, and the questioner should also visit. Everything else would be emergency call abuse

After I have taken the wind out of the sails of one or the other answerer, of course, your question also deserves an answer from me.

yes, that can be psychically conditioned, and follow your grief.
Despite all this, the complaints are clarified. Please go to your family doctor, he will check you once. Different causes have to be excluded. It can come from the heart, or from the muscles, it may also be a thyroid disorder or it may be mental. To find out, you need a sound medical history, a lab and an ECG.
I said in the comments that you are not a rescue service. I stand for that, too, because I do not believe that you are acutely life-threatening ill, because you have the symptoms for a long time and it seems to be bearable - rather the concern for your health - I can understand very well - is the problem here, But: If you have a breath, if you get sick, if you start to sweat, or if the pain is suddenly very strong (like an elephant sitting on your chest) or anything different than usual, you can also think of this option.

That can decide the emergency call.
Sorry, but from the past you do not know what is going on.
You are not psychics and I'm not.

For that, I know who regularly abuses the emergency call, knows and uses the correct keywords. If you think the heart is spinning, do not wait but call.
And the emergency service is very well able to clarify whether it is an acute emergency or not. That is not the questioner.
And I'm not.
What the questioner has done so far has been negligent towards himself.

And meanwhile I have buried too many such negligent people.

You've already chosen 'your' answer, but I'd like to answer you because you're writing something crucial: 'It's been getting more common lately (every 3-5 days), especially when I'm lying quietly in bed or in front of the laptop Sit '- exactly this forward bent posture dissolves eg A muscle tension in the area of the thoracic spine, which leads to heart bites.

Here I have selected hands-on videos from the pain specialist Liebscher-Bracht, which you can use to try to get better. For this you have to do these exercises more often:

(at min. 0:17)

A little tip: look at the enthusiastic comments on the videos!

In order to avoid that the stretching of the thoracic spine is nullified by the wrong sleeping position, here is this information about the right sleeping position:

I hope that my answer will help you, and wish you much success!

Small addendum still: you write of tingling in the fingers. I know that from the office when the head is tilted forwards: if you take the wrong posture, it uses the intervertebral discs between the cervical vertebrae and just as you get older, you also feel signs of wear and tear. After some time in this posture, I always had a numbness with tingling down to my hands - a physiotherapist confirmed this connection.

Here are two exercises:

https://www.liebscher-bracht.com/nackenverspannungen/