Marraige advice help

Its been 4 months since I had my son I'm a first time mom and im married . I wanted advice from married woman or not anything is fine with me. Personally me i care about my marraige and want to turn anywere to find the bright side of keeping a marraige together. Well there have been some issues with me not trusting my SO I've never checked his fone at all since being bf and gf and a month ago i saw on the front a message from Bianca💋 and when i confront him he started crying and said she's just a friend and he only talked to her because we have been fighting . Well i let that go he comes home late sometimes drunk at 4am . Then i saw his recent emojis were all flirty and like theses😍😘😙😉😜👌💦🍆.. yesturday i asked for his fone he doesnt not give it up even if i say ama leave anything even if im in rage or crying he says no and no and he goes thru my fone and he admited to having girl contacts but says there from work . I am a stay at home mom because he doesnt want me to work and raise our first kid. I feel he might cheated like probably thru text or watever . There is never closure because he refuses to talk things out . I dont know what to think its forsure he isnt going to show me his fone .basically idk what to think no more... i need advice.help anything because i am drowning myself in this house thinking he is unfaithful and im here having no were to go and with our son ...