I too breastfed EXCLUSIVELY for 14 months....my son refused a bottle of any type. I had to wean his daytime nursing at about 1 year old because I was returning to work. He had no problem dropping those feedings - since I did it gradually, dropping 1 feeeding each week. He easily took a cup. The last feeding I gave up was the bedtime nursing session. That was a little bit harder, but, I just had my husband put him to bed while I was out for 3 nights in a row, and we were done! Granted, my son was a 'binkie' addict until he was 2 (at which time we weaned him off that!).
As for the sleeping, my son refused to sleep in his bed, so we started sitting in his room until he fell asleep. Then, we reduced our sitting time in his room to 10 minutes, then 5 minutes, etc. He had a hard time for a couple of nights when we refused to sit in his room, but we reassured him that we are 'right here in the other room'.
My recommendation is to stop the cosleeping first....since your child is still nursing. It's very easy to control them when you have something they want! Perhaps nurse her in her bed and lay with her for awhile, then leave after she is sleeping. And then the next week, nurse her in her bed and then only lay with her for 10 minutes, reducing the time each week.
Good luck.