Hi! Fellow binge drinker here. I also had a problem getting more than a few days at a time, for years I "tried." The thing about all those false starts is, I wasn't really ready to give up drinking. This time around, I'm finishing up day 39. And it does take a while for the rocky road to level out, we all understand.
Everyone is right, I think, a plan and a support system are keys to this recovery thing. Congrats on day 3! Just remember, every single recovering alcoholic who's been sober for 30 years was once at day 3. And then day 4... And so on. You can do this too!