Running while TTC

I started running about a month ago. Nothing super intense. But I am getting worried it is why we cant get pregnant. Anyone know of anything one way or another if running 3 times a week (20 min) could interfere with that? I have read that exercise is good for you and that makes sense, and I know i should talk to my doctor but I cant get an appointment for about a month right now. Just want to know if maybe during my fertile time I should just maybe power walk.

Thanks!!