bad day, bad mood

I had a very bad day at work, and it ended terribly. Wireless devices in the lab failed to work towards the end of the day; I stayed late to try and resolve the issue but came up empty. I will have to go in for a few hours on Friday to fix this, which also happens to be my day off. These devices go into production on Monday, and I need to make sure they’re working properly. Then I have to deal with an attitude at home. The attitude is in response to parents trying to assist with homework. WTF?!?! No appreciation; just attitude as to why we suggest changes. It’s an English paper, and the grammar is incorrect. That’s why you should make the damn changes. I’m so pissed off right now. This is not how I wanted to start off my 4-day weekend.