D.M.
A.,
This could be a few things...age/stage change where she is becoming more aware of her surroundings and is exhibiting a desire to stay with you.
Or like Jacy said it could be teething. I used (and still do for molars) Clove Oil on my son's gums. It's great for swelling and pain, and is all natural. You can also try drops, strips or tablets that are OTC homepathic and great too. Motrin is the best IMO for teething pain.
Rule out the pain first, and then go from there. Good Luck and just be consistent with what you've always done. It sounds like you have a great routine in place and if you don't change it things will go back to normal once this passes.