Hi itsme
Congrats on 8/9 weeks. I went through the same issue at around the 2month mark. Probably my toughest part. Not 30 days not 90 but around week 8 or 9. I think it was discussed in the May group posts (my SR home group) by artsoul and others. You might want to look it up.
Anyway, I don't remember exactly what I did to alleviate the mental craving. I think for me i was really grapling with the thought of never drinking again and it was messing with my concentrating on one day at a time. I pretty much remembering hunkering down and following my plan one step at a time. It consisted of eating well, exercise, meetings, and sr. All I can say is it will pass.
Congrats again on your sober time... Feels pretty great some days don't it?