What Causes Vaginal Burning, Itching And Malodour After Intercourse?

I'm 37 have had a history of abnormal pap smears but never had an answer for why. I have also never been able to get pregnant, with either my ex husband or current husband. I did go to some fertility clinics years ago and was unable to get a reason for my infertility. I do have a tilted cervix but was told that was only a stumbling block not a cause of not conceiving. I'm now Worrying about chronic bacterial vaginosis both as the cause of the following symptoms and as a reason for my infertility. After my husband and I are together I frequently have a bad internal burning feeling, raw and itchy feeling externally, and shortly after his sperm drains from me an unpleasant smell is present. Sometimes this doesn't happen but it usually does. It has caused me to shy away from love making and is stressing my marriage. I don't have insurance right now but really want to know what is going on and what I can do to clear it up as we plan to try to have a baby when things get more stable. Also is it possible to be allergic to his sperm?