Is it normal for a guy to behave this way?

im 21 years old this year and im a mother of a 3 year old boy..i have played the role as a daddy and mummy for my son ever since he was only 3 months old..i step into a relationship with a 30 year old guy at the year 2009..we are facing communications problems..recently i intiated a break up cause im feeling tired..he tried to hold me back and i accepted him again..but nice and sweet things din last for more than 5 days..i tried calling him ytd night but he din ans..at around 11pm he called me back and say he was sleeping on the vessel..oh..he is in the shipping line..after explaining we hang up the phone and i went to bed..but this morning when i wake up there was not a single call or text from him..my first thoughts were not "he must be fooling outside"..but my first thought was "is he alright?did anything happen to him?"..until now its nearly 2pm the next day i called him there was no ans and no replies on text too..is it normal?please help me..i have no one to share with other than YOU..thanks alot..