Hoping for help

I’ve been fighting with a few things for awhile. and I guess at the end of it, I’m afraid that it will come back and it does, but I’m never sureit would have come back had I not ruminated on it, or if there is areal medical reason and situation I could be dealing with. So back in July I went all the way to a cardiac cath procedure and a heart monitor just to be told there is no blockage and whatever is going on it is not cardiac, but yet it continues. just today at 2 pm after a morning of pickleball and a walk and sex I had another episode started with anxiety and then higher anxiety at Walmart then I went into work about 2 pm when I finally felt weak and well like I was going to pass out but it got better an hour later or so but the rest of the afternoon I was left with oh god is it back? When is it coming back etc. the only thing I can think of is I loaded up with carbs for lunch right before everything happened I don’t know thanks.