I had intercourse 3 weeks ago. my partner is so sure he did not release in me. but 3 weeks after intercourse i have experienced lightheadedness, i had fainted once, i threw up once, fatigue, acne, and headaches. am i pregnant?

Test, if worried: It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A home urine pregnancy test gives a reliable result if done correctly. One can test about 3 weeks after sex (3 weeks after when conception might have been), or 1 week after missing a period. An Ob-Gyn doctor can evaluate any persistent or worrisome symptoms.