Regrets are understandable, but they have to be put in their place to make way for the new.
Maybe schedule a specific time to dwell on the past and consider the wrong turns, and get yourself some paper and a pen and a kitchen timer.
Here you are now, and this is where you have the power to make choices that will actually have any effect.
Well done on 80 days! To your health and to your choice for sobriety! I think a sober birthday is a pretty cool thing to look forward to!