Hi,
I had sex with my girlfriend. We used a condom and it broke, but I did not eyaculate. Her period started on march 31 and we had sex on April 9. After we realized the condom broke we stopped right away. I noticed that there was some pre-seminal liquid in the Condon. How likely is for her to get pregnant?

Enough you have to worry.

Seriously even ONE chance in a million odds mean nothing if you are that one person.

And seriously... if you are breaking condoms... learn to handle them... the are NOT easy to break... unless you foolishly keep them in your car or wallet.

It is possible, there is no way to say 10 percent or 60 percent, there is a chance, your chances are lower but there is still a chance. Now you both wait and see if she gets her next period