Broke up and depressed

Me and my ex fiance had been together for four years we have a two year old little girl together and i am 14 weeks pregnant with our second well about a month ago he said openly he's cheating on me with a girl he works with i messaged the girl and asked her if all this by was true and if she knew about me and my kids she lied straight to my face said him and her did nothing but flirt and that she did know about me and my kids and him ... i knew her bf and her bf wanted the truth too after i found a love letter written and signed by her in his car he asled her about it and she finally came clean he called my ex and asked him.about it and he told him the truth as well .... two weeks ago he kicked us out of the house with no where to go so i came to my moms i have been so depressed and so alone i hate myself bc i find myself just wanting to pick up a beer and drink my pain away or commit suicide its been so hard i have nothing and no one im literally all alone in this no job no money nothing thing at all to my name im scared and alone he offered 200 a month for our daughter and to still get her anything and everything she needs so my kids will be fine needs met regardless but its me that's the wreck right now i cry i constantly have headaches and am depressed all day everyday i need help but idk how to go about getting it i wouldn't ever commit suicide bc i love my kids so much and they are the reason i know deep down i couldn't do it ever ..im.heartbroken hes just moved on with this girl and hes been making my life tough bc i do not want her around my children but idk how to make that even possible while my daughters with him while she visits with him shes got a record and people from her assult charge looking for her shes on probation for assault and has drug possession charges am i wrong for not wanting her around my kids am.i being unfair? Also anyone know if medicaid covers counseling after you turn 21 i have adult medicaid right now but idk if it covers counseling?