Chest pain

Hi my name is Sabrina I am 28 years old and I am from Dallas, TX. It’s been an overwhelming year for me. I have been having chest pains since April. The pains are a strong pinch/striking pain. It comes in episodes. The pain lasts for a second and returns every 5-15mins until it is completely gone(takes3-5 days to stop) I have seen 3 cardiologist done a stress test echo test and heart CT. First cardiologist told my my vessel was too small so prescribe me life long blood pressure medication. I didn’t feel good about this so I went to see 2 more options. The other two options told me my heart is fine and my vessels aren’t a problem since I have another one that makes up for it. I also had an endoscopy done because I get acid reflux and the dr told me it’s mild and is not the case of chest pain. She told me to go back to my physician and see what they could do next. So I’m back at square one. I have seen 4 primary care physicians they can’t tell me what it is. This week the pain has come back it and is now happening in my left breast area. It usually happens right in the center of my chest. Episodes happened April, July, October, now. I can’t find anything triggering it. It comes when I’m resting, walking etc. I do noticed it stops when I am laying down very still. I never had anxiety in my life so I don’t think it’s that. The first time I got they pain the doctor gave me propanol and it seemed to work. The second time it came it took it again but took some time to work. The third time it came the propanol did not work.Please help me I am so lost and it’s really having an negative impact on my life.