My girlfriend and I had sex (I used condom) last Feb. 14. 2 weeks ago, she had her regular period. However, yesterday, she saw a blood which seemed to be spotting. Is she pregnant?

It is possible of course. While good, condoms have a 3 to 18 percent chance of failure. No birth control is 100 percent.

Spotting can be caused by many reasons. She has to actually miss a period, and then wait till she is two week late. Then do a pregnancy test. A test is the only way to know.