I need help…emotionally

I have just broken up from a long term relationship. He is a narcissist and was abusive in many ways. I was trying to leave him. He sabotaged me getting a car or job. He told me not to worry. Then later I find out he’s been seeing someone from work. For 6 months or more in our relationship…he left to stay with her. This happened within 2 days. I wanted to leave 1st but now he did and o got replaced and I can’t get myself together. I have my 6yr old with me and all I do is cry. I’m taking all my meds for depression and try to get out of the house, walking but it’s hot and summer. Idk what to do to help myself. I’m waiting for stimulus money to get a car to do some kind of work. He keeps coming back and holding me. I don’t want this and told him to stop…he hasn’t. I’ve even sent his new Gf a text explaining that. I get no response. Which I’m not surprised. I’m just so hurt and heartbroken… help… ?