K.M.
Could she be done with naps? I know it sucks to lose naptime as your "downtime" but she'd probably go to bed earlier and easier. Can you institute quiet time in place of naptime? You could have her stay in her room and play with quiet toys or put on a video to keep her calm. At night do you have a good routine? Turn down the lights in the house, turn off the tv, bath, books, some snuggle time, go to sleep. How about yourself? Do you have any way to get a break and reenergize yourself? I find when I am run down and cranky it affects my kids too. If I can keep myself pleasant and positive (and some days that's super hard), I see the good effects of that as well. This may be a little odd, but does she get a lot of one on one time with you? Times where you are focused on her and playing with her and connecting with her? Sometimes when I am very caught up in doing things around the house- paying bills, laundry, vacuuming, making dinner, etc, she will act up-even though I'm home with her for hours all day long. The craziness at sleep times may be related to getting all your attention, even though it's negative. Think about how much energy you're putting into getting her to sleep, you know?