i have also experienced this. i don't drink much water. do you? if not i suggest when you feel that way drink a few glasses of water and see how you feel a few hours later. it helps me. when dehydrated you will feel. hot flashes headaches feels like you might pass out but don't almost like your brain clicks off for a second (its a weird feeling kinda hard to explain) you will sweat at night too. drink more water plan and simple.
why do i feel lightheaded fatigued and sweat during sleeping (no fever)? . i am an almost 37 yr old female with a lot of stress right now. dr. put me on effexor and i started not being able to sleep having bad headaches feeling lightheaded and constipated. i took it for 2 weeks and he told me to stop when i called him. he called me in something else but i'm afraid to get it. i've been on paxil prozac and celexa and never felt this horrible. i haven't taken anything in almost a week but feel lightheaded many times thoughout the day. any ideas what could be wrong?