My girlfriend has just found out she has clamidia, and given to me. I'm OK with that, I knew her past.

She spoke to the last person she slept with before me, they said to us that they had a test shortly after and the test said that they didn't have anything.

Is it possible that the test was taking to quickly and the infection didn't have time to take hold and get noticed in the test. I know it wasn't me as I was a virgin before seeing her and had done absolutely nothing with any one else.

We've had huge arguments because I've accused her of cheating on me, as to me that could have been the only way?

She may have it but the question is, do you? Typical symptoms would be slight burning and itching in the urethra, particularly when urinating. Also urinating more frequently than usual and a clear, thick discharge from the penis. If you experience any of these then you need to get tested. Actually you should get tested anyhow. If the test is positive then you need to get on antibiotics right away.

It was positive, the problem is where she got it from, as the last person she slept before said that after sleeping with her he got tested and that it came back negative