I have regular periods monthly, last month it started on the 9th so I'm waiting patiently to see if it comes this month but I'm a bit concerned. Last week we had unprotected sex & several times he ejaculated in me, a few days after the first time we had unprotected sex & the night after we did again I had a light pink blood but only when I wiped after using the bathroom this happened to me for about two days then stopped. I also felt sick the day it started & the next day I began to actually get sick several times throughout the day & the next several days, sick to certain smells & after eating. My nipples have been a bit tender & about two days ago they were a purplish color. Today I took a first response pregnancy test (mind you I haven't missed my period yet, but sometimes you're able to test positive days before your missed period.) & I tested negative. Is there a chance I could be pregnant & have to be wait to see if I miss my period & what I was experiencing was implantation bleeding? Your thoughts ?