My high heart rate when I woke up surprised me. My heart rate is high during the day too but not like it was last night or this morning. I slept good I thought and took my pulse because I thought maybe it'd be normal for once. It was so high I couldn't really keep up. I am on my period this week. Tmi, sorry. Since starting on Monday and now Thursday, I have been weaker, dizzier, and my legs feel disconnected from my body when I walk. My chest pain is more frequent too, but not constant. I'm also more sensitive to foods, my throat reacts somewhat when I eat chocolate or onions or garlic. So that's been a newer development making me think histamine problem. If anyone has experienced anything similar or has any ideas please let me know. So is this not pots since I was laying down? Is it another dysautonomia? * About an hour later it was a lower rate. But still will probably fluctuate in the day as usual.