Hummm, seems like that girl might have a few issues. It also sounds like she wouldn't mind getting pregnant either. Why exactly did you trust her on the 'I'm on the pill" claim?
Anyway, the odds all depend on where she was in her cycle when she last took her pill. Without that info, there's no point in us even guessing.
Basically, you're just going to have to hope that she doesn't want to get pregnant either and wouldn't be stupid about it.
A bit of warning: guys only have one
chance to choose whether they want to be a father or not, and that's at the moment they're deciding to put it in with or without a condom on. Every other choice is totally
up to the girl. Make that one decision wisely