Recent Heart attack

Hello everyone. I haven’t been on this group for awhile, but was very active for a year when my heart was in what they called permanent AFIB. In May of last year I had an ablation. After healing & Amiodarone, it went back into rhythm & has stayed. Ive been doing great,, but last Wednesday had a heart attack, so I may need to go to another group. Anyway, heart cath showed no blockages, no stints or surgery needed. Heart remained in rhythm. There was a narrow place at the end of an an artery that spasmed causing the heart attack. What causes the heart to spasm? In addition to the 200 mg of Amiodarone & 5mg Eliquis, they’ve added Amilodipine 5mg, cardvedilol 3.125mg, isosorbide daily, rosuvastatin calcium 29 mg, & a 0.4 nitro subl to carry in my purse. I’m a bit overwhelmed & terrified of so many prescription drugs. I’ve been reading about the drugs & of course don’t want to have another heart attack. I won’t see the cardiologist until 3/30, but I was wondering if cholesterol pill is normal protocol. My cholesterol on labs are always good. I really don’t want to take this pill. Also the nitro pill is listed under who should not take isosorbide mononitrate Er - One of the conditions is a heart attack???Anyone experienced this & how are you doing?