Overreacting or hormones??

My husband works 3-4night shifts a week, he has been doing this pretty much a year after we got together. We have been together for 4 1/2years. Iv learnt to deal with him working night shifts and used to being on my own. Before I got pregnant he would do things together and would cuddle me whether it be when we r spending time together or in bed. Since Iv found out I'm pregnant he's been distant, doesn't hold me or kiss me if I try and make conversation he's blunt as a knife. I don't know if I am overreacting to him being like this or is it just my hormones making me feel like this. I'm not a emotional person but when he behaves like this it makes me want to burst into tears as I feel like I'm useless or he doesn't want me!