I had unprotected sex about 4 months ago. I have been having a 3 day period every month. I have been feeling extremely nausea sleepy all the time going to the bathroom almost twenty times a day and mood has been changing. I eat a lot more than normal and my stomach has been very tight! I have went to the doctor n they said nothing is wrong my pregnacy test have came back negative. I haven't went back to the doctor in almost two months. Can anybody help me