Not a stupid question at all.
I was able to feel o pain, and it was as you described, every month, and temping and my clearblue fertility monitor correlated the same info.
VERY possible to get pregnant.
The last two times I got pregnant was

the day before o.
(and actually, sometimes the o pain is right after the egg has released, so you may have ovulated the day before that.)
Swimmers can live up to five days in good conditions, so you never know!