 [ Symptoms ] 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 am afraid to get it i have been on paxil prozac and celexa and never felt this horrible i have not taken anything in almost a week but feel lightheaded many times thoughout the day any ideas what could be wrong [ Disease ] home pregnancy tests are very accurate so it is unlikely that you were pregnant before especially if you were at least 7 to 10 days late for your period chapped lips are not a common pregnancy symptom but it sounds like you had this issue before given the recurring problem with your period and the other symptoms you are having i would not assume this is pregnancy it is worth a visit to your doctor to find out what is going on there is no harm in taking another pregnancy test but if it is negative call your doctor so you can find out what is going on