I had 2-3 sexual interactions with my boyfriend during my fertile period right before ovulation and although unlikely, I have been freaking out about getting pregnant.
We used a condom, and there was never any genital to genital contact WITHOUT a condom. Slight penetration (with condom) happened only once or twice for a few seconds in those interactions and there was NEVER any ejaculation nor any pre-ejaculate (according to him).
I am more worried about the times we were rubbing outside (WITH condom) as I was EXTREMELY wet and my cervical mucus was egg-white and stretchy. There was never any ejaculation (no ejaculation since almost a week, so no old sperm as far as I know), and he claims there was also never any precm, and even if there was a drop it couldn't escape the condom (Condoms never tore or broke, and there was a second when we were rubbing and whilst I was getting up, the condom slid up slightly but never came off the tip... again, the penis was always dry.)