Sleeping troubles

It's been a long time since using this app! But within the last few weeks, my daughter has gone through this stage of NOT going to sleep at night. We have tried CIO with no success. She has been walking for the past month and will be 10 months old on Saturday.. so I'm not sure if it's because she fears she will miss something or if it's a sleep regression. She has also fought her daily nap routine and feeding schedule. She isn't interested in bottles/sippys with formula unless she is sleepy. The rare occasion she doesn't fight sleep is because she falls asleep with her formula (I know it's not a good habit). Any tips on getting baby to go to sleep once again without such a big fight?