Congratulations on 90 days!! I remember the first 3 months being pretty difficult. If you ever want to read some of my threads I was still having issues until even over a year. Although there was a bit of a turning point around 3 months. The mood swings still carried on for a few more months after that. In fact now I think the moodiness I experience is just me now but it was nothing like the first several months of sobriety. Keep going. It may seem challenging right now but you will just gradually feel better. I'm sure other people have already told you but what you eat is really important. Sugar can really play a big role in moodiness. Or excess caffeine. Both of which I indulged in after quitting. But small changes every day will add up. You body and your brain are going through massive adjustments, it will take time. But I think at 90 days you are over the acute phase and it will get better!