I make my own treats all the time since I have one dog that is on a vegetarian diet. Peanut butter is a good ingredient, so are blueberries and bananas. We use oat flour in all the treats we make and substitute maple syrup for sugar.
http://www.dogtreatkitchen.com/blueberry-dog-treat.html
That’s the recipe we used as a starter and have experimented since then.
If it was me, I’d see a vet immediately. Particularly with sudden onset like this, I’d suspect some scary cause such as neurological problem, spinal problem, infection, toxin … I wouldn’t wait.
home remedies is not the answer please rush her to the vet for a scan