Baby has changed our marriage ...

I’m a new mom, been with my husband for 4 yrs now. Been happy and in love thus far ... I feel like ever since baby came along it shifted our marriage into a unhappy place, and yes we both wanted a baby. We have power struggles on stupid things on how to raise our son ( he is 5 mths ) there is apparently a mommy way to do it and a daddy way to do it 🙄 it causes tension between us constantly and I just feel we aren’t acting like ourselves or dealing with it correctly. . We will have a argument and it just gets swept under the rug, we just move on and leave that baggage just not settled.

He’s been having odd behavior aswell like a crisis or something... wanting to play video games or have a drinking night or go see a movie alone.. I caught him masturbating twice like wtf... we are sexually active when we aren’t being assholes to each other. I just don’t know what’s going on but I’m afraid things are falling apart and don’t know how to approach him without being or seeming like I’m overreacting or being dramatic ....

Anyone been through this ? Any advice ?