Feel so alone!

Momma K😍
Im 14 weeks pregnant today!😍 my boyfriend and I been going together for a year In a half and he is not into or seems happy bout a having a baby with me! We had a miscarriage last November so I'd think he would be happy I mean I understand being a bit nervous. I try talking to him bout the baby everyday he just says yup! I'm sad and angry a lot lately and starting to wonder what's going on. Is he cheating? Regrets getting me pregnant? Should I just get out now? Keep in mind I have a 4 year old that calls him daddy. Her dad left when she was one for drugs. I'm lost and really would like and advice or opinions you might have. Thanks:)