I have developed a really short fuse!

Ris
Ok so I'm 32 weeks pregnant and everything is going well apart from my mood. 
Whatever paitence I did have is no longer there. 
People and their stupid questions, incompetence and just blatant laziness is driving me up the wall and frankly pissing me off. 
I've tried deep breathing to calm myself but that just makes me more hot under the collar more. 
I feel like I need to lock myself away before I say something i'm going to regret. 
Anyone else feeling this way?