Pelvic Inflammatory Disease

Can you get PID from bacteria other than that of Clamydia or Gonnerea (sp?)? I am having horrible abdominal/pelvic pain. I would say it is just cramps, but my periods are irregular (they are about 60-75 days apart)and I never get cramps when I do eventually start my period, not to mention these pains have been there on and off since end of July/ beginning of August. I went to my doctor about it, but she told me it was just menstral cramps take some aleve and they would go away in a few days. Well here I am 4 months later with pain so bad at times I cannot move. I've had PID before when I was 16/17, doctor said it was caused by Claymidia, but I was not sexually active and this (to me) feels like PID.

I'm going to make an appointment with a Gyno for sometime this upcoming week, is there anything I can do now to help with the pain I am experiencing(the pain is all over my abdomin, not confined to one area, and its sometimes dull ,but mostly like someone is stabbing me with a knife), I've never been to a GYNO and am kind of nervous, is there anything I should know before hand? Would you happen to know the basic cost of a GYNO appointment? My husband and I are on a tight budget and don't have health insurance so all would be out of pocket.

Sorry I droned on and on. I've got tons of questions,like what is the pregnancy success rate for someone who has had PID more than once and does scaring always occure?! Thanks you in advance for and help/advice you can give me!