Should I feel as bad?

Little background before I post I am insecure about how I look after a controlling previous relationship. I had a baby 11 days ago and believe I am suffering with PPD again as I did badly with my now partners first child.

He set up an Instagram page for his car he like doing up. Anyways I looked on it and he only seems to follow pretty, slut dressing kinda girls who also do their cars up. When I mention to him does he still want to be with me he says stop been stupid ect and I am his type but I know I’m not especially since I had our kids. Idk I guess I am just having allot of emotions atm from having a baby and not feeling pretty etc but am I wrong for feeling like this? I can’t just snap out of it as he says to do! Not since when I had our first he searched and messaged other girls!