I'd say that your frustration about the scarf is not really abnormal. A lot of people would be angry if something they created got messed up.

Flipping out about the cat throwing up is extreme...I mean, the cat already didn't feel great; why go off on it?

I don't perceive anything about OCD...?? Maybe you're just having a difficult time right now. If it continues, I'd suggest a mood stabilizer.