Help… partners search history

I found out a few days ago that my partner has been searching up local escorts / “massage” services / local meet ups with women online to fulfil one of his fantasies. He has also turned on disappearing messages on WhatsApp for these women which I didn’t even know was a thing! I happened to see on his laptop he had some messages there and soon realised he had forgotten to delete them on his laptop. He doesn’t know that I know. He also has the money in our relationship, we receive help with payments and mine gets paid into his account too so that it’s all in one payment. He sends me money for food shopping every so often and sometimes enough to pay my personal bills (I often have to ask for him to top it up as my bills haven’t been able to come out). He says that I can’t be trusted with our money because I spend it all on travel to see my mum (she helps in looking after our 10 month old son). Last month we supposedly didn’t have enough money to get our food shopping (it had been two weeks!!!) and I was getting concerned that we couldn’t feed my son. I asked him to get the shopping and he said well you’ll have to ask your family, we don’t have any money. My dad helped out with supplies and my mum paid for a small bit of shopping which was great. I have since found out that my partner has been sending money to women online to fulfil custom requests for videos and to video call them. He has been topping up credits on a well known adult site in order to chat to the women online and it has made me feel sick to my stomach. He also sometimes disappears for an hour or so at night to ‘fill the van with fuel’…. Which is very odd seeing as he doesn’t usually go anywhere at night and we go to the petrol station together. I am a stay at home mum, the ONLY parent that does anything for my son. I do EVERYTHING and I have done since the moment he was born. I could barely fuel myself to breastfeed him and barely had enough food to give him his solid meals and my partner who’s supposedly ‘responsible’ with money has gone and done this!!!! He tells me I’m a shit mum and a rubbish parent often. He has very little respect for women in general and I find myself resenting him more and more everyday’. I feel so hurt and so lost and so confused. He always blames me for everything and brings things back on me somehow, even if it doesn’t make sense. I don’t know what to do in this situation, I feel so out of control. He still doesn’t know I know about this…