I have random low grade fevers too. That is probably because mast cell degranulation.

About swelling, pain, HR and BP: what does your cardiologist say? Have you been monitored with 24h Holter monitor?

Hey hb, I used to get low grade temps also. I also used to think it was pre-menapausal. HA! I even had my hormone levels checked but they were fine. Now I have learned it was most likely from mast cells. I do not know if I still have low grade fevers or not because I got tired of checking it every time I got warmed up.

As for your low Heart Rate (HR), first I would double check with the doctor that did the halter tests on you. Let him know that you have a new symptom. Prior to seeing him/her I would start keeping a journal/record of your Blood Pressure (BP) and HR to take to the doctor. I did this with mine. He said he had never had anyone come in with a journal of date/time/bp, hr/symptoms before, but he liked it and asked me to keep up with it. He asks me for it everytime I see him Before I go on, just keep in mind that we are all different and I think your first priority should be to discuss this with your doctor. Moving on now with my personal thoughts. I was freaked out when my heart started going HIGH and then LOW. Freaking out probably didn't help matters
What I have learned about my issue is when my bp goes low I'm generally reacting or should we say my mast cells are having a party! I usually have a few other symptoms (these symptoms change from episode to episode). For example: I may feel palpitations and take my bp/hr only to find it's lower then my norm. Sometimes it's not palpatations but my lips and cheeks on my face start tingling. Other times it may be that I get naucious. See what I'm saying. It's not consistant. Then there's the times I feel the other symptoms but my bp/hr is normal. We won't go into that.
If my bp/hr are low but I feel ok otherwise, I simply stay seated or lay down for a bit. I remain calm and try to relax. Usually within 15-20 min. it goes back up to normal. If I have other symptoms that accompany the low bp/hr (light headed, tingly, naucious, etc) I take a dose of benedryl. I get sleepy but eventually my bp/hr goes back to normal and the other symptoms disappear as well.
This is just my personal experience and may or may not work for you. I do hope that you are able to find SOMETHING that will work. Just, please, be sure to address it with your doctor.

Kim

Have you talked with your doctor about Gastrocrom, which IS Nasalcrom for the belly?