I'm an emotional wreck, and I'm not sure what excuse I can use for the hormonal roller coaster ride

I'm not pregnant, and I'm not PMSing, yet I'm an emotional wreck. Ready to cry at the drop of hat. Saturday, Troy, Isabella, and I went to a little friend's 1 year old birthday party. Don't even remember what happened, but some little thing nearly moved me to tears. Perhaps two of the babies had a bonding moment. But, I'm ready to cry in a not-so-good way. I get frustrated easily. My husband doesn't do things a certain way, and I think he's trying to purposefully offend me. He's not, though. I'm the one that's messed up.