Chances are that your mildly abnormal cells have nothing to do with your fertility. The abnormal cells that pap smears find are epithelial cells (skin cells) and are on the top of the cervix's skin.
You have been trying to get pregnant for 4 months. That is not at all unusual. The average amount of time for a couple trying to conceive is approximately 6 months. Keep trying.
If your periods are 37 days, then that is what is 'normal' for you. Everyone's body is different.
Since you are going back to the gyno in the next week, be sure to have your list of questions to ask. All your pregnancy and fertility questions can be answered by your doctor who is going to be way more reliable than a message forum ;)
good luck!!