About a week before my last period, my boyfriend and I messed around. We were both clothed (him:boxers, me:underwear and spandex shorts), but he ejaculated near my crotch, and his shorts were wet. Within about 2 minutes after, I changed both my underwear and shorts. I started to get freaked out that maybe sperm seeped through my clothes, so I took Next Choice One Dose within about 48 hours after. I had my period on time, which started out a tad lighter than usual but turned normal for about the first 3 days, then ended light. Its now about a week after, and everyday since I have been feeling queasy, been burping, my stomach burns/cramps at times, and I am slightly constipated. Since that encounter with my boyfriend, I have been stressing overly, nonstop about the possibility of pregnancy, even though chances are small. I still stress over it today. I have also been stressed with school and dance, which started around that same time. After jumping back into dance, having not danced all summer, my body has been put through strenuous workouts and been pushed far past its limit, without working up gradually. I know Next Choice and over exercising could contribute to a lighter period. And I know its about a one in a million chance that I am pregnant, being that we were clothed AND I took the emergency contraceptive. But my symptoms have me questioning myself. Could they just be due to stress? Or should I worry of greater problems?