FAIL! Total mess up at Wainhouse Tavern Open Mic (cover of Don't Want To Miss A Thing by Aerosmith)

Had a total screw up at an open mic yesterday. I did 4 songs in total and messed up every single one. This was by far the worst one though. What set me off was hitting the wrong chord early on which made me put the wrong emphasis on a lyric and while I was thinking about that I missed the key change.
Its very frustrating and disappointing, I practice these sets all week and they are perfect when I do them at home but I still make so many mistakes on average during these performances. These things happen though, you have a really bad day like this one every now and then, you just have to consider it as a positive learning experience and get back on the horse. A year ago I would have had to stop and probably change song but here I just carried on singing until my playing caught up which I think was probably the best I could do in the circumstances and which I consider to be a massive improvement for me.
Really happy with the GoPro though, I can trigger it from my watch, it picked up the audio ok and the resolution is great! Files are huge though!