I'm really scared.

I always have off periods, but lately I've been keeping track and sort of have a grip on it. I've used an app that gets pretty darn accurate. Maybe a day off or two. My periods are usually about 40 days but the last two have been 24-28 days)*

I had sex with my boyfriend last night. I thought I just started my period because earlier that day I saw blood and it's about that time. (and a week earlier, I had been spotting blood the same day i calculated a good time frame for my ovulation) so my boyfriend midway through took off the condom. Once I noticed and scolded, he put a new one on but kept going. It was only about a minute that it was off. He never ejaculated, even after with the condom on. But I know, precum... (if it's any help, he had the condom on before foreplay and we hadn't done anything in a month) We Always practice safe sex by time planning and using a condom, (waiting on dr for birth control) i guess he just assumed since I was on my period it'd be okay..*

I thought I'd be okay because I saw blood earlier that day. (bright red. few drops to make me believe I was catching myself start. Caught it before going out last night) *But the blood never came back afterwards. And tonight I got the stringy cervical mucus you see near ovulation.however it's very lightly tinted pink when I wipe. *Even if my cycle had gone back to the 40 days, I STILL would have passed my correct ovulation. But I"m still horrified because of the discharge, and because I am on antibiotics for a step throat.

Bad chance I'll get pregnant?