Sorry it's a long one but people's opinions on this might help me see sense.
H and me have finally split after years of a miserable relationship.
Been together 10 years, have one ds and am currently pregnant 36 weeks)
We hAd split before which only lasted a few days. H went mad when we split and smashed the house up. H is a bit of a social media addict and as soon as it happened, instead of talking he put it all over social media etc. We started talking and decided to give it one more go, but certain things needed to change. One of my conditions was that h helps more in the house and gets out of bed at a reasonable time and improves his personal hygiene. He was extremely messy in the house before, hardly showered and used to sleep in when he wasn't at work until midday.
Things got so much better, he was clean, helped in the house etc. After a few months I got pregnant, then things started slowly slipping. Eventually it got to the point he was worse than before with everything such as hygiene, being messy and it helping in the house, sleeping in and dealing with money etc (I also did things wrong, I am aware of that, it wasn't all him).
One day I took a picture on his phone as mine had no memory, I then went to send the picture to myself, when I opened the album to select the picture there were numerous naked pictures of himself, and then a screen shot of a message he had sent to someone, the message had a pic of him lying topless on the floor. (No idea who took it! He says he uses the camera timer) and the message said 'shit sorry, that was meant to go to - woman's name - . I felt bad for snooping, so didn't mention this to him. The woman's name is someone he works with.
I got so fed up but was scared to end it as I had nowhere to go and last time his behaviour was so intimidating.
One day we hadn't spoke all day, I was upstairs tidying and he was watching telly, I went downstairs and as he hadn't showered the room smelt. I opened the window and he went in a mega strop
saying it was freezing, I was wearing a strappy top, he had a t shirt and jumper on, he then put on a big coat and wooly hat and sat there huffing at me. Eventually I flipped at him and told him I couldn't do t anymore, our relationship was a joke etc.
I quickly threw a bag of stuff together for me and ds and we went to a friends.
H stayed very very calm
i didn't hear off him for a few days, then he messaged me saying that he has a right to be there when dc is born. I said I had no problem with that as long as he is reasonable in the mean time. We then started talking like normal and he was going on about putting all bills in his name and he was buying a new pet and maybe because I will claim as a single person I could help him out with money 
A few days after he asked to see ds, he doesn't drive so I took ds round and the house was spotless. He had also had a shower etc.
I have popped in unannounced a few times and the house is now immaculate. I then found out that he had not told mil that we had split up. I told her. She said she doesn't want to see my ds or the new dc
he hasn't put a thing on social media either which is very very unlike him, and he seems happy.
I claimed as a single person and all my benefits (apart from child benefit) have been stopped while it's looked into. I have also been told I can't get any help with housing... at all. when I took ds round I was in tears saying I have no where to go and no money, he just said I could take some food from the fridge
.
He said he didn't tell his mom as she annoys him. He hasn't offered any money for maintenance and doesn't seem bothered I have no where to go.
I don't know if it was his plan all along, to get me out. As he seems a totally different person and I couldn't beleive the tidying he had done in the house and how clean he was being
but I also find it strange he didn't tell mil, and hadn't put anything on social media (there was one post that was quickly deleted).
I then found a book he writes down all his incoming/outgoings in. He had worked out how much money he needs to pay all bills himself and for fags and stuff and how much he has left over at the end of the month. I have no idea if this was done before or after I left. He doesn't seem concerned about me or th children at all as long as I ferry ds to him for an hour or so when he demands.... and last time I took him I asked him to give ds a bath.... he said he couldn't because he'd put his dinner on (none for ds) and he was hungry
i bathed ds and then took him back.
What would you make of the situation?