I am 19 years old and I am on birth control. My fiance and I have sex on a regular basis. Before, During, & after my period. I have had incidents where I thought I was pregnant before, so I don't know if I am just to paranoid or what? My last period started on the 22nd of July and lasted til about the 26th. So at this point I haven't "missed" my period yet because its not time for me to have it. I have felt nauseous the past few days. Some days I am constipated and other days it feels like it doesn't stop. I am peeing more than often. My breasts are not bothering me at all. I am having hot flashes and have been craving certain foods here lately. I don't know if I am sick or not. I do work at a preschool so I could have caught something there. I feel like I am just being paranoid and thinking that I could be is making me think that I am. I know I just need to relax but I can't seem to. I am very irritable & I feel like I have been snapping at everyone. Maybe I am so stressed out that I am making myself sick. But I just worry because my fiance doesn't use protection, nor does he pull out. On the other hand, I am on birth control. I am just so confused!!!! I don't want to wait to see if I have my next period or not!! HELP!!!!