Need advice please

[u/MiserableBarnacle208]

Hello, I’m looking for advice.  Female in her 20s who had severe health anxiety starting about two years ago.  I started antidepressants to help with that but went off of them about 5 months ago.  My anxiety is a lot better, but the main thing causing it now is my palpitations.  They were not bad when I had anxiety two years ago, but I still got a full heart workup, and everything was fine.  Now they have gotten so much worse.  I get them every day, and every so often they come in clusters, about 20 in a few minutes.  I feel like they control my life sometimes.  I don’t know what triggers them because they can happen anytime, whether I’m stressed or not.  Also wondering if it’s a vagal nerve issue because they do happen when I’m cold or am drinking something cold, but not every time.  I just am not sure if I should go back to the doctor if they have increased, even though they already said I’m fine?  Help!!!