Need some sound advice please read and help....?

Me and my boyfriend have been together for a very short amount of time.Things have moved very fast in our relationship and now we recently found out we are expecting which totally took us both by surprise.At first I wanna say everything was okay we were acting lovey dovey as we have always have been.But the last week my BF seems all of a sudden disconnected.He doesnt talk as we once did.He is more and more distant as the days go on.I have asked him what it is that is bothering him he just reponds with stress.Stress with work,stress with getting ready to file papers to go to court to get custody of his son,etc...I dont push for anymore details but I feel disregarded because I have my own stress with my job,my daughters fathers family,and now his distance.But the one thing I dont do is push him away or make him feel horrible.He still says he loves me everyday which I do believe but I need to know how to talk someone who obviously doesnt wanna talk cause this is tearing me apart inside :-( I dont want little issues to fester up to bigger ones cause they havent been dealt with. Please please please help me