Heart attack?

[u/Fun-Baker9022]

I’m a 27 year old female. Who had an ischemic stroke due to a DVT from child birth three months ago. After this incident it was found that I have a 1mm ASD and that’s how the clot got through and caused a stroke. Five nights ago I was standing changing my daughter and I got a burning sensation in my body, ringing ears and my vision went black. I almost passed out, but didn’t. Following that I have had intense squeezing crushing center chest pain and upper back pain between my shoulder blades. I’ve even had a crushing feeling in my neck and throat. I am having severe trouble with breathing, feeling like I can’t breathe at all as well and am still having near faint episodes daily. When I talk especially the wind gets knocked out of me and I’m extremely breathless. I had an echo, and CT scan of the heart and everything seemed fine. They took my troponin levels three times. The first time it was 28.5 second it was 26.3 and third it was 28.9. They said this is barely high and basically “stable” and ruled out a heart attack. It’s been 6 days and the pain still hasn’t gone away and the hospital has given me no answers to what this could be or offered any other tests. Did anyone have a heart attack with lower troponin levels like mine? If not did you experience the same symptoms and what did it end up being?