Is this going to happen for us?

My husband and I were sure we didn't want any children for a ittle while into our marriage. We got married very young and I felt that being a teacher, I could channel my maternal instincts onto my students and we could still have the freedom of being without children to travel, etc. Eight years into our marriage, I feel (obviously irrationally) like we are being somehow punished for these feelings because we are ready for children more than ever, and are experiencing trouble. We have been trying techinically for 2 years, but not since we were trying to stay withing my teaching schedule. Of course when we start trying, my periods get irregular and I get cysts.
When I started telling people about these troubles, I was astonished at how insensitive people could be. "Just don't think about it and it'll happen" is the famous saying... "don't think about it"?? It's all that I &*@% think about!!