@jadillow- Hello. I presently take Wellbutrin and I love it. I'm sorry that you aren't responding well to it. My PCP added it to Zoloft (125 mgs) because I was very depressed and couldn't snap out of it over several months. Sometimes too much medication is prescribed and it will give you side effects that you don't want. I take 150 mgs and that's enough for me. Any more and I get jittery too. You might just try to lower the dose, but slowly to see if it helps.
You should never stop any mood medication all of a sudden. Cut back about 10% at the beginning. Is this your idea or your PCP's?
I'd love to introduce you to a few people who know about titration.
@jakedduck1; @mmussak; and @elwooodsdad.
You might also want to check out the Connect Heart & Blood Health group, https://connect.mayoclinic.org/group/heart-blood-vessel-conditions, due to your concern about your heart.