TTC stress

I would love to have a baby but in particular a summer baby, since I haven't been able to conceive in the past few months my timing is all off and I am at the verge of just giving up, in all honesty I don't know why I want it to be this way I just I have totally consumed my life with this whole pregnancy thing...my DH doesn't really understand why I'm stressing the issue and wants to continue TTC, lately it has caused us so much tension and frustration between each other it's no good....am I being selfish for being so picky and wanting a summer baby? I know stressing isn't going to help me get pregnant any time soon...hopefully I can get some guidance from you ladies!!!!