Mate, the one thing to remember is that, no matter what, as long as you're still breathing then you'll likely still be having a better day than some.
Take me, as an example. Yesterday had a scan on my back because I knew it was worse than a year and a half ago, went for a quick beer to let the rush hour die down and had a look at the piccies on my tablet. Only needed to see a few to make me glad I'd had a crap earlier or I would have had one there and then whether I wanted it, things were squeaking, shall we say, because it's worse than I thought.
Got home, the missus starts nagging because I had 5 beers and a huge argument kicks off because she just assumed I wanted to drink when the reality was I needed to compose myself so I could explain to her how bad things actually are.
So we all have bad ones, life has a habit of bitchslapping you when you least expect it, the trick is knowing when to just say DILLIGAF and push the crap away.
Shit happens, sometimes you're the statue and sometimes you're the pigeon, just save yourself and don't dwell on it and stress yourself further because what's done is done and nothing can be changed.