Even sober people have blah days. If you have a history with depression then it's good to look at what can help you with that, but in the mean time try and find little things that will cheer you up a little. I wrote a list in early sobriety of things l could do which took like half and hour maybe, which I would see as a reward or just a nice thing to do. It helped to avoid thinking I was missing out all the time x