pms symptoms

is it normal for your period to be late if you’ve had sex for the first time? my period is due in 3 days and me and my boyfriend had protected sex w a condom on tuesday i usually have pms symptoms by now but my cramps stopped and only my nipples are tender not my breasts. i’m not having any headaches or backaches or any other pregnancy symptoms but i don’t feel like my period is 3 days away, help? could i be pregnant he wore a condom and pulled out before he came. is this normal? i’ve been having discharge and brown flakes when i go to the bathroom and wipe