When my anxiety was at its worst I was on Ativan, Zoloft and Atenolol and when I had a panic attack my blood pressure would still go to 170/130. I became obsessed with my BP, checking it every 10 minutes. If it dropped to 100/70 I would freak because I thought it was getting too low and then trigger a panic attack where it would go through the roof again. Same thing with my heart rate; it was a vicious circle. As I learned to manage my anxiety it became more stable
Burping and hot/cold are all typical anxiety symptoms caused by the adrenaline rush that triggers fight or flight instincts. Our bodies react to the adrenaline in strange and bizarre ways that make no sense causing us to question what is wrong with us. I will be sitting at my desk working and suddenly my stomach jumps like someone has scared me and the adrenaline begins. I start burping which triggers tightness in my chest, heart rate increases and I get hot or cold. It always comes out of nowhere.
You are not alone.