Dude. Seriously.
Next time..
Next time you can't get off..
+
Rather than making a dumb decision and worrying about the crap you're worrying about now. If you're not responsible enough to have responsible, safe sex... lol, well, shouldn't have it?
By the way, one more food for thought: If the girl let YOU take the condom off, ever entertain the idea that she's let another dude take the condom off, hence having unsafe sex, hence opening herself to STDs like the ones you repeatedly proclaim she must not have? My last tid bit.