Possibly Pregnant AGAIN😭

I'm going crazy inside because I might be pregnant again after just having a baby May 8th😩 Me and my husband planned our baby girl and have been very irresponsible since I gave birth to her. I don't know what I'm going to do if I am pregnant. We already have two children. He is in the National Gaurd and he's an electrician, I only work part time at a burger place. I don't feel like we can afford another baby right now. My husband acts like it's not a big deal but it really is. I just feel so lost😭