Ok, so i had unprotected sex on the 1st of August and my boyfriend came inside of me, but I was on the 2nd day of my period. My period started on the 31st of August and lasted until the 4th of August. However, it was only heavy for maybe 1/2 a day the rest of the time it barely ever a 1/3 way filled up a regular tampon. And for me thats very light. Everyday since the 1st I feel nauseas right when i wake up for about an hour. Now on the 8th and 9th I have been feeling sick around 1:00 and actually vomited a couple times. My bed is also unfortable my lower back hurt, i get randomly dizzy or lightheaded, and have a nearly constant headache. My period isn't due to start for awhile. Is it possible for me to feel being pregnant already or is it EVEN POSSIBLE to BE pregnant? sorry for the long narrative..... :)