New baby, need help

I just had my son on 10/17, & we were not trying to get pregnant. We were engaged planning a wedding. My now husband is 22, & I’m 20. When the baby was first born, my husband would help a little bit through the night but not a lot. & now he doesn’t help at all. Refuses to get up when the baby cries, won’t help me change diapers, nothing. I’m only breastfeeding so that part is already just me. & sometimes I just need help... but he won’t. & we currently live with my husbands mom because we hadn’t gotten our own place when we found out & we couldn’t afford to keep renting with a baby coming. Him & his mom are slobs & leave dirty dishes & trash all over the house for me to clean up & if I don’t it will just sit around. I’m tired of being the only one taking care of the baby & the house but I don’t know what to do or say. His mom isn’t making us pay rent or anything and I’m on maternity leave so my husband is the only one between the two of us with income. Should I just let it all go, & continue doing what I’m doing or push the issue with my husband? I’m so exhausted between taking care of the baby & keeping up after them that when I try to sleep I can’t.