OK so I am 23 and I have 2 kids. I was on an iud but my body was rejecting it so my obgyn took it out. I had unprotected sex during my strongest day of ovulation and I was supposed to get my period yesterday instead I have been having light brown discharge nothing heavy just when I wipe and its not there every time I wipe its only happened twice once yesterday and once today before this my normal discharge was a little heavier than normal and I have been really naseaus this past week and have acually thrown up a couple times. Anyway my question is could I be pregnant? Should I worry or am I just getting my period?

First why do you say worry, since if you have unprotected sex during the most fertile time, one has to assume that you were planning another child ?

But yes it could be, you need to wait another week, and if still no period, do a test