So a month ago I lost my virginity. I was on my second week of my first pack. I took a pregnancy and it was negative, then 14 days after sex no sign of a period. went to Doctor all test were normal. I'm now 25 days late. loss of appetite, 16 pounds gained. 6 times I felt really nauseous. I haven't had sex in a month. is this normal??has anyone else have this happen before??