Anyone else an Emotional wreck this week?

Megan
18 weeks tomorrow and I have never felt more hormonal. Each day this week I have crried, screamed and just all around not a happy camper to be around. 
Anyone else having similar problems? This entire pregnancy I have been happy, go with the flow-relaxed but now it seems every little comment, conversation or even a song has me crying. 
I am hoping this is just part of the weeks hormones and it can get regulated soon! 
Anyone else?