My experience was similar to Dee's. In order to "protect" myself from being drunk in public, I simply started drinking at home which inevitably led to being a very isolated and very sad person.
You can still have all the things you want in life, such as sharing special moments with your sister, and doing it sober will make it more real too.
11 days is awesome!!
Keep up the good work and thank you for such an honest and raw share.