I would just like to welcome you to the heart and cardiovascular disease
forum. I am just filling in for the regular moderator, and you may see other mods on this forum until she gets back. I hope you get a relpy to your question soon. In the meantime read other posts, or you could do a search at the top of the page.
I have fatigue due to fibromyalgia and I take adderall for it. It is a stimulant though and I don't know if you could take it if you have any heart problems.
I hope that your fatigue lifts and that you feel better soon.