Working out

So I've already emailed my surgeon and my pcp, I am waiting to hear back. Mostly it won't be until Monday. So while I wait I thought maybe I could get a little insight from all you helpful people here.

I have mitral valve regurgitation. I take heart medication to slow my heart rate Bc I was having insane racing of the heart. Two weeks ago I saw my pcp Bc the medication was making me dizzy. Well come to find out my blood pressure was dropping to low levels 92/58 and my heart rate was 42 Bpm. My dr lowered my dosage, I had signed up for the gym the day before and asked my pcp if I had any restrictions for working out. She said anything should be fine but I should wait to take my morning dosage of medication until after my workout. I have been following all her orders to the T.

Here it is two weeks later I'm still having bouts of severe dizziness throughout the day. My trainer has me doing 40 minutes of cardio 5 days a week, 3 days of weights. I have felt awful for almost 3 weeks now. I feel like I am sick however I am not sick. After every workout I feel extremely nauseous, and usually come home shower and fall asleep the minute I sit down until I have to get the kids from school.

My husband thinks I am hitting the gym too hard, for the amount of calories I get in a day. I am 3 months post-op and still only able to get about 500 calories a day. I try to eat more but I just can't, I start feeling like I am going to vomit. I get my protein and most of my water.

I feel like Bc I was feeling this way before working out it could still be the heart medication even tho For the most part my BP and pulse are good. But the whole gym and lack of calories makes sense as well.

Anyone have any advice?