Getting pregnant day after your period?

M

Has anyone had sex in the few days after their period and ended up pregnant? This was only my second postpartum period (my son is 21 months though!) And my first cycle was 55 days, so obviously very irregular. My periods were both 7 days long but based off symptoms I ovulated twice in the 55 day period, I just didn't get the bleeding until way later if that makes sense. So last week I had unprotected sex with my husband the day after my period. I'm just wondering the likelihood of getting pregnant from that since my cycle is so irregular right now! And if anyone has actually gotten pregnant from having sex that soon after a period! Thanks!