Hi J.,
My goal was at least 12 months. Unfortunately, my daughter became less and less interested and we stopping nursing all together by the time she was 7 months. She decided she had more important things to do than to lay still and nurse, like playing! This was a very emotional time for me since it was such a bonding event.
I was pumping 3x's every day at work, but without much success toward the end since my electric pump kind of puttered out around the same time my daughter quit nursing.
Anyway, we gradually worked ourselves to just nursing at night, much like you have done, and started to pump less at work. I didn't have much pain when we stopped completely, but I know you can hand express as necessary. If you can figure out how to do it, I never did, it only takes a couple minutes and will relieve any pressure you have. Of course, pumping once a day is great as well. If you don't decide to pump/nurse/hand express at all, I would think within the next couple of days you should be feeling better.
BTW- I know of many babies who wean themselves around the same age as your daughter, and even around the same age as mine was. I felt like a failure for quite awhile because I thought I was doing something wrong since many people told me babies don't just wean themselves. I don't know if you're feeling this way or not, but don't let anyone make you feel bad about it.