Struggling in marriage

Me and my husband have been married for 6 years and we just had our first baby after infertility.

I am having a hard time being happy in my marriage. I don’t feel much connection to him and feel like he always needs to be right on everything and it’s not even worth arguing anymore.

He has admitted to things that I guess are considered cheating but he admitted they were wrong and knew he needed help. He has not done anything wrong for a couple years now (that I know of) but I still get upset at the things he did.

I don’t feel any sexual desire but it’s probably a combination of being a new mother and my antidepressants and birth control.

I’m scared to leave because I may just be in a hard place in my life and don’t want to make huge decisions like this when I’m not in the right mental place and I’m scared because we have a child together and I don’t want him growing up with separated parents. I also am scared because he is the main source of income. I work 3, 10 hour days a week and make about $16 an hour and I don’t think I could do it on my own. Plus I love his family and I couldn’t imagine not being close with them. He doesn’t like my family and is always complaining about them and makes it kind of miserable but I love my family 😢

I just don’t know what to do anymore....