No period since June?

As it says I haven't had my period since June 11th. So I'm 39 days late. I'm on the pill so its always been spot on. my boyfriend and I have sex regularly without protection. I have no symptoms other than sore boobs. I've been having light cramps on and off for months, but only got clear discharge. Last night I got cramps and when I wiped, there was light pink, but nothing since? I've also had a sharp stabbing pain on the right side of my pelvis for about a month too. My Dr appointment isn't for a month, and I was just wondering what everyone thought? I tested 3 times and all were negative.