I am eighteen years old and my friend and i recently had an intimate experience, which ended up with him ejaculating sloppily and it got all over me in areas such as: hands, stomach, chest, hair, etc. We wiped it up pretty good with a towel, but didn't escape some getting on my bed. Just before that happened, he rubbed his penis on my vaginal opening, almost penetrating me, but i wasn't ready to have sex, so we stopped and settled for making him ejaculate. We never washed off, just wiped everything up and then layed down and cuddled to sleep. The next day in the late afternoon, I was nauseous and tired. The following day, i felt the same. I am worried that the contact with his ejaculation could have resulted in conception. Please help me, i am so so worried....