Webmd says I'm pregnant or dying...

So I've had bad lower abdominal pains (not cramps but a sour stomach and pressure almost, down where it usually hurts for Pms symptoms). Usually this happens a week before and during my period and subsides about the 3rd day. But it's been over a week after my period and it still hurts. Tmi but I'm constipated as well and I thought maybe that's the cause? Webmd says I'm pregnant but last I had sex was almost 8 weeks ago and I've had 2 periods since then (although 4 days late for my last one). It also says I'm basically dying if I'm not pregnant.  Anyone had this problem? I just want it to go away