Ok, I'm freaking out because I haven't started my period yet or had any PMS and I randomly threw up yesterday morning. I have taken a few pregnancy tests in the past few days which have all come back negative, but I'm still really worried. I cannot be getting pregnant right now. Been having unprotected sex with a friend and I'm not yet on regular birth control. I know this prob sounds stupid... but I'm kinda scared. I have been really stressed from moving and being concerned about finances, so I wasn't sure if the stress could be pushing my period back. I have also had an issue with being nauseous from anxiety... so I hope that was the issue. My family doesn't know me and my friend have been having sex together so...