You have come to the right place. It has been 3 weeks for me and most everyone goes through rough days and then we have some good hours.
The things that helped me have been reading the DB book and also "Hope for the Separated" by Gary Chapman. There is a specific prayer in that book and also several suggestions on how to proceed with your life while you are separated. There are many great posts from people who are in our same situation.
It's good that you have seen some progress even though there have been mistakes. I wish I could say the same; I have not heard from my H since the separation and he won't answer emails or voicemails (and I have not begged, pleaded, blamed). These contacts were to apologize for my failings and part in the separation and also about finances.
Please do some reading, praying, and take care of yourself.
The task ahead of you is never as great as the Power behind you ~ unknown