hmmm, is it possible she could also have some reaction to some food you are eating that comes through your breastmilk?? could you perhaps try eliminating dairy from your diet for a specific amount of time and see if it improves (im not sure about amounts of time for food to not affect breastmilk sorry)
With her nose, it may not seem stuffy but perhaps try a saline spray up her nose (dont know if its allowed at her age but im sure it is) we do this with Caleb before he eats so he can breathe better.
At the moment she seems to be OT soooooo perhaps try putting her to bed alot earlier for her first nap, maybe try at 8am?? shes nearly ready to go up to an A time of 1hr 20-30mins so it could be that shes not ready to go to bed so early first of all but as the day gets on shes becoming OT due to the short naps etc but we just need to get her out of OT mode first