Just want to know?

I have a Dr.'s appointment tomorrow, but I'm just asking to see if anyone has gone threw this before. I am late on my cycle 2 months and am having some abdominal pain now for like about a month. I'm not pregnant I have gotten a blood test to make sure today. It was negative. I was given some antibotics last month for the abd. pain but its still there. Has anyone gone threw this? and what was your out come?