My girlfriend and I had sex twice this month and we used a Trojan spermicidal condom. It did not tear or come off, and I pulled out. Over the last month she has been doing sports a lot. I am like freaking out now because I don't understand what the problem is. Could it be a hormonal issue? What is it?

She may be pregnant, no birth control is 100% effective.

If she does a lot of sport and is extremely fit then that can change her cycle.

Wait untill her next period would be due and take a pregnancy test using first morning urine.

If it is negative and she still does not have a period then it's time to go to the doctor.

I had to spread the rep Shaz.

No birth control is 100% effective. Keep that in mind.

It could very well be the sports. When I was going to the gym every morning it changed my cycle drastically, but still don't assume that she isn't pregnant in case she is.