I had intercourse on the 13th and 14th unprotected. Then I started my period on the 17th. Is there any possible way that I might still be pregnant. I tried to have intercourse last night and it hurt and I have been having sharp pains and feeling funny like pressure in my lower part. So I am just wondering if I might be pregnant.

If and when you have sex very close to the start of your period, if you do conceive it is possible, but not likely, to have a period. Also if you are pregnant, you should not be having shart pains and pressure when having sex at 3 weeks of pregnancy.

It sounds much more like a infection which would be causing the pain during sex. I would get a check up from your doctor or local clinic, who can check pregnancy but also an infection.