Is this Implantation bleeding?

Hay, just wondering if im pregs!?! I had reddish, pinkish, than brownish discharge 2days ago, it lasted only 3 days n was very light. ive bn crampy on n off. Im 5 or so days from getting my periods. im tired abit more n a couple more symptoms. Im not on cons n hav had unprotected 4 times in the last 2 wks, with my ex!! My period has always bn regular.... around the 10th of very month. I neva got this with my first child. just hav this feeling i im, n it driving me crazy.... Dont know when to test, or how to tell my ex!!???