You could be just about to start your period. If you suspect you may be pregnant, and it has been 2-3 weeks since you last had intercourse, then you can take a pregnancy test with first morning urine.
That is exactly wot happened 2 me when I was pregnant. If u do take a test just now don't b dishartened if it comes bak negative bcoz it may b implantation bleeding so there will not b enough hormones yet so just take another in 1 wks time or everyday woteva suits lol but ad me as friend and plz keep me posted x
Take a test and see what it says