It's just not working...

My husband and I have been trying for over a year after I had an ectopic pregnancy January of 2014! Since then, every month I've been disappointed! :( extremely emotional every month as soon as AF comes. What should I do? Any tips or suggestions? He has 2 kids from his previous marriage and I have one. It was so easy to get pregnant the first time and now it just seems so much harder after ectopic!