Muse, so glad you went to be checked out and hope it is nothing too serious. You mention that your abuser/father is dying...could be that triggering flashbacks (the body remembers and experiences though the mind does not) ...repressed emotions being experienced by the body.
It is always good to seek medical attention, though, to rule out other health issues. One evening ten years ago, I spent hours convinced it was my anxiety with the tightness I was feeling in my chest and difficulty catching my breath. I also have acid reflux, so attributed my symptoms to that combined with my anxiety...and of course my mind ruminating always makes the anxiety worse. Then the pain worsened and my left arm was affected...it was then I suggested to my husband to call the ambulance as I think I could be having a heart attack. I was only 45. The EMTs did an EKG and could see the ischemia. I was transported to the hospital and blood work revealed elevated cardiac troponin levels. It takes six hours after the attack for those levels to rise. I now have three stents in my heart.