Thankyou both for your comments. Thats helped a lot. x
I agree. You could have been ovulating or about to ovulate when you had sex. The chances of pg each month when you are trying and doing everything right is about 20-25%, so it's not a guarantee that you are pg, but it is a definite possibility.
Good luck with whatever you are hoping for!!
If you had unprotected sex then you can get pregnant. If your cycle is usually 30 days long then you probably ovulate on CD 16. Since sperm can live for 3-5 days I'd say the odds are good that you could be pregnant. You are most fertile in the days before you ovulate.