Terrified to exercise

Exactly what the title says. Im scared to exercise. A couple months back, I ended up in the hospital with chest pains. They said my heart was normal, and gave me hydroxozine until I could see the doctor. Well I took it PRN, and worked out one day after taking the medicine. In the middle of my workout I got super dizzy, like to the point I had to stop and drop to the floor so I wouldn’t stop.

Since I’ve been taking lexapro for anxiety...which hasn’t helped much. It seems like it was fantastic the first month but now the pain in my chest is starting to come back. I’m scared about being debilitated again. Even more terrified to work out, but working out supposedly helps anxiety. Im just scared im gonna die, or even just get dizzy and black out. Any advice? I’m so tired of feeling this way.