Big purchases when tight on money?

Am I wrong for being mad at my boyfriend for spending almost his whole check on one thing?? He’s not working because he got hurt and we don’t know how great he’s going to be paid with worker’s comp. We have a two and a half year old, and I’m pregnant again, he told me he didn’t want me to work since I’m pregnant and he doesn’t want our daughter in day care. He got paid his last check from before getting hurt on Tuesday and I brought up needing to pay my phone bill and he said that was fine but when I brought it up again today he made it seem like it was the biggest inconvenience in the world. And then he said “well we don’t have any money so if I pay it, we won’t be able to do anything else” I knew how much his check was and I knew what we spent while out together and it didn’t add up.. he said he needed to make a purchase and got mad at me when I told him that he didn’t need to buy it and that it could’ve waited since we don’t have the money for it. That money could’ve gone into savings like it needed to so we could start saving up for baby stuff. I’m pissed. He says it’s “our money” but he treats it like it’s only his.