Anyone have any advice? ???

Has anyone ever been through anything like this so close to just having a baby?? Im trying i really really am trying hard to keep it together. My so of 14 yrs finally admitted to cheating on me .. tells me it's MY fault and he has no plans on stopping it. That since i don't work..i stay home and i care for our 5 kids i clean cook everything for him i basically have to just deal with it! Our youngest is not even 3 months old yet im already struggling with low milk supply and now the past two days well since he finally came out with it i cant even squeeze out a drop. He knows how much it means to me to breastfeed. I feel like im in a living nightmare! I have zero friends /family to be able to leave and all I want is to get the hell out of here

I just can't believe how he can do this and just not have any remorse or anything its blowing my mind

Does anyone have any ideas on the first steps i can take to leave