15 days sober, but my mental health in decline

Been trying to stop for ages. 2 weeks ago I had one of the biggest downfalls where i felt i hit the rock bottom, so it was a good start to stop it. Last weekend was a bit hard but I managed and even socialised. I am now 2 weeks sober. But today is the third day that my mental health in the most shittiest state. I do have doctors appointment to talk about it. Is this normal, will it pass? I am really worried the way I am atm.