Emotional or .....

My husband and I just had our baby girl in November. We've decided we want one more. So he's been telling me consistently that we need to be healthy before having the next one. He says to me, "you need to lose weight before we try for another baby. " okay I understand that I need to lose some weight....whenever I tell him I need to lose weight he gets mad because I'm being hard on myself after just having a baby...but I'm not happy with my weight. I also feel horrible about myself when he says I need to lose weight. Maybe I'm just emotional....idk I felt like crying and hiding in the bathroom. On top of that we have had sex 4 times in the last 2months.