Pregnant or not?!?!?

So me and my husband has been having unprotected sex foe a while now, and of course he finishes everytime. Well I have been having cramps ever once in a while nothing major well I started my period Friday a week early and then it stopped Sunday, but it was different then other periods,it was to light to be a normal period... Well I keep getting little cramps nothing major again, should I take a test or just wait????