My girlsfriends got bleeding problems.

My girlfriend was late for her period, so i broguht her a test, but luckily before she did it she came on.

2 days after she came off we had sex again with condoms, and now she says that she is getting slight bleeding and cramps, she thinks shes pregnant and im personally shitting myself.

We're going to do a test tommorow.
What are the chances of her being pregnant? We have ALWAYS had safe sex.