Just a pregnancy phase?

Ever since I found out I've become very unsocial and also unfriendly... I hate going out I hate hanging out with friends. I'm honestly dredding my baby shower so much because I don't want to hang out with anyone. Every little thing bothers me and makes me mad. I've never been this way ever but it seems like it's just getting worst.. Has anyone else had this Happen? Does it go away...