As I was reading this I could not believe that a someone else is having the same symptoms as me, almost identical. I also have had a lot of mold exposure in my life. My heart rate is highest in the morning and I get the feeling of panicking. It will be 70-80 laying down then shoot to 100-120 when I stand up. I went also went to the ER and they found nothing. And then you mentioned that the antihistamines helped, they help me a lot to. I have tested ketotifien, cyproheptadine, Benadryl, all help. I think this may come down to a mold colonization in our guts and mast cell activation issue. My current approach is to try and shift my gut bacteria to a healthier balance with fibers, PHGG, the Thorne fibremend product, sodium butyrate. One thing that also helped me is PEA supplement taken 3x a day(1500mg). It's a protocol by Guy Daniel's on YouTube The Microbiome Expert. If it's bad for you in the morning I would suggest drinking a bunch of BodyArmour or Gatorade upon waking, it helped me calm the adrenaline along with taking a PEA and maybe one drop of cypro. Something else I plan to try is injecting KPV peptide and then BPC 157 combination because KPV is a mast cell stabilizer and the BPC will help seal the gut. I also have had months of gut issues, bloating, gas, etc. I think the root cause is mold. You can try taking binders like charcoal, Mycobind, Cholestyramine(available from Mexican pharmacy online), bentonite clay. Good luck man
