Yes, I think it's probably worth a try going back to the morning nap. About 5 weeks ago we were convinced DS was dropping his, as he missed about 4 in the row (I was GUTTED, as we get a lot done when he does this quick morning nap). But low and behold, he has embraced it again, so I think it was just teething.
I know it's hard, but if you can face it, I would make sure she sleeps no later than 7.30am then get her back to bed earlier - like 9.30am - 2 hours of being active crawling or toddling around should be enough to make her sleepy, even if it doesn't seem that she is.
If she's awake again by 10 or 10.30am you have then got a nice big gap for her to get properly tired by 1/1.30am.
Anyway, it works (most of the time!) for us. Am not BFing any longer though, so don't have that to think about. Maybe what would be good is for your to BF her in her room just before you put her down, if you can make it work in terms of when she likes to feed? At least just a little nurse until she gets back in a habit of napping?
I'm quite a fan of routine, though my DS didn't take to it quite the same as my DD did, so I relaxed things with him, but I still find it helpful sticking to these rough timings. As he gets older, he becomes more flexible - able to stay up longer if we're out doing something, but I like having it as the default.
Good luck