OK, so I was just at the doctor today for some pains I've been having now for quite some time. She said she thinks its and infection of the uterus. Now as I have been looking it up PId has come up a number of times. But the cause of PID is NORMALY by chlamidia but I've been tested twice and I donate blood and I have no std... sooo is this possible and are there are reliable resources out there that I could look at for some advice... Im on an antibiotic doxycycl so I guess I will see how it goes. What exactly is an infection of the uterus?

STDs are the MOST common however PID can be caused by a bacterial vagninosis.

Pelvic Inflammatory Disease-Topic Overview

This has some good info.

PID can be caused by previous abortions and all sorts I think I may possibly have it.
Do you have a lump in there?
I also got checked for stds but got the clear.