So tonight about 7ish I start feeling very tired and extremely weak. Then around 8:30 I start feeling like nothing is real. About the same time I start getting nauseous and worried that I'm going to die. My usual anxiety is like a constant thing, this has been off and on for 4 almost 5 hours. I try to fall asleep then BAM I feel nauseous followed by a slight hot flash. All the while I'm praying I don't die because I need and want to be there for my 2year old daughter. Please help me. What could this be?