Trying for baby #2

So my SO are trying for baby number 2 !! He’s in the military so it’s hard to plan correctly lol. My last day of ovulation ( said by this app) was Friday and I got to see him on Sunday we had unprotected sex and he finished inside me. I’m not sure if I’m still ovulation tho , my boobs started hurting back mid ovulation and hasn’t stopped. I’m not suppose to start my period for another week so for it to start hurting mid last week kinda confuses me . This never happened before.