i have had unprotected sex quite alot for the past 2 weeks and recently ive been having light cramp like pains and twinges in my lower abdomen and have had a white discharge and vaginal itching but i just held it down to having lots of sex but a few day slater ive been getting a baby pink discharge and its very noticeable when i wipe im really worried about this now could it be a sign of pregnancy that early or could it be down to an sti please help