Is it just me....😥

I'm 7 1/2 months postpartum and I'm on depression medicine. A low dosage. I dont know if that has anything to do with what I'm about to say but I feel like Hubby isnt attracted to me anymore 💔 I know the past couple weeks ive gained a little weight. I'm already a fat horse 😭 I told him that I wouldn't get upset if he told me I need to lose a little weight. It seems like he always wants me to suck his cock...like it seems like thats all he wants. I feel so insecure and its been bothering me lately...I dont know whats wrong with me...I hate that all he wants is me to suck his shit..it makes me mad sometimes he smacks my buttbut that's it. We have sex usually once a week. Sometimes its amazing sometimes...its just the usual and its just one position...every time. He says he's getting too old.... -.- he's 22. Am I fat? Please be honest. ???