Im 23, he is 34 and we keep arguing simce had our 2 month old…

Hi there, we keep arguing as I’ve been left to do absolutely everything on my own! If you’d asking him what does the children need or where are their things he would not even have a clue! Every spare minute he is on his phone and even his whole family supports me and tells me to tell him to get his shits together. He has barely done any of the night feeds, maybe 10 times at the very max!! And that is after thousands of arguments and him telling me to wake him up when baby is due which i did and all i hear to start of its “ffs babe, she is not even awake you woke her up on purpose” like wtf? He keeps telling me he is going to break down and have mental problems but what about me? He fell ill and slept for 3-4 hours nap in the day, i fell ill and i cooked dinner and put the kids to bed and did everything like I normally do, not even 30 minutes nap.. how is this fucking fair??? He keeps telling me he had enough of us arguing and things but really im the one who had enough!! And in between all of this we are waiting for the new build we bought to be completed… like should we even be together!

(Btw the 2 children I referred to its our newborn 2months old and a 4year old girl who he had from another women and she lives with us full time and exclusively, so she calls me mum and i treat her like my own!)

Help 🥲