Depressed!

Soo.. my fiancé and I have been together for 8 years and will be getting married in august. Only thing is, I'm dealing with some past issues. About 6 years ago he was unfaithful to me, with a girl he worked with. 😢 later I had a pap, it came out abnormal, it was chlamydia!! He insisted he was tested and didn't have it. To make a long depressing story short, I obviously forgave him. I'm worried because we have been together so long and have never used any contraceptives, but have never gotten pregnant. I'm afraid the std caused infertility. I really want to have kids someday but if I can't have kids because of his mistakes, idk if I can forgive him. I have not seen a Dr., I'm too scared of what I might find out. Help!!