I have a two year old, he was a surprise but I had no trouble conceiving then. Now I'm all out of…

I have a two year old, he was a surprise but I had no trouble conceiving then. Now I'm all out of whack but trying for a second and having trouble. I had a chemical pregnancy about a year ago and have been trying different things since. Does anybody have any advice about naturally getting cycles normal and increasing chances of conceiving?