How Can Chlamydia Be Treated?

I was just diagnosed with chlamydia. The reason why I went to the doctor is because I had cramps and felt like if I was going to get my period but I didn t get it. It’s been almost two weeks that I was supposed to get my period. I told the doctor about my cramps and he examine me with tact. He noticed that I had some pain in my left side. He send me to get a sonogram and saw that I could have PCOS , but he also told me that he wasnt dignosing me with that because I needed to have other symptoms that I don t have. He did many tests and told me that if anything he would called me. He called me with the news that I had chlamydia. I never had any symptoms, only mild pain sometimes in my ovaries, and I had this pain I want to say from 5 months ago, but I didn t believe it could be serious. I am not sure if I got it 5 months ago or a year ago from who I believe I got it. I am scared that Because I waited to get diagnoised in the future I will be infertile. The doctor didn t said anything from the sonogram the only thing he said was about the posibility of having PCOS. I want to know if the time I waited to get diagnoised is a long time to cause infertility