my last period began march 10th & my boyfriend & i have had unprotected sex multiple times since then. we were having a lot of unprotected sex march 16-18 also. but 2 nights ago i noticed a very light brown/pink discharge in my underwear & it was there when i wiped. and i know implantion bleeding occurs 6-12 days after conception. didn't really think anything of it so my boyfriend & i had unprotected sex again the next morning & it was there while we were having sex. it was odorless & then went away later that day. i've also been getting really dizzy, having weird cramps, sleeping a lot, & feeling bloated. but now there's a weird faint smell & the light brown discharge is back but it's very light. what could this be?
Yes, you could be pregnant and the discharge could be due to "implantation." If your period hasn't arrived by the end of this week, then get a pregnancy test.