Financial talk

My husband is currently getting unemployment and is in a transition to go back to school. He also receives VA benifits for disability that he received in the military and will soon be getting his GI bill. I also work full time. Together we are making ends meet but financially things have been hard to adjust to with this transition. I sit down and pay the bills monthly and throughout the month and he doesn't understand where our money is going. He wants to spend money on extras such as snacks, movies, clothes etc. and we just don't have it. When I try to talk to him or have him sit down w/ me to look things over, he gets frustrated and won't listen. It all aggravates him! I want his input and for him to understand so we can stop living check to check. How can I better communicate w/ my husband about money or any "sensitive" issue for that matter without him getting so frustrated that I just give up to avoid the conflict? Just to add a little information..we are expecting a child in May and we really need every extra penny right now as I don't get paid maternity leave.