What a sick way of living, waiting to be happy that somebody bleeds. Makes you feel like you'd cut your balls rather than go through that shit again. Worst feeling ever.

If you are confident enough with her, discuss the pill. No collateral effects nowadays, the only bad thing is that you (both she and you) have to remember. But it's worth.

No pill? Use condoms, and set up *strict* rules for your... er... foreplay.