I am so sorry to hear this!
I would absolutely look into it as that isn't normal. Jewelina is quite small, she is 6 1/2 months old and just recently gained a bit of weight so she is 2 pounds now but has never had balancing problems or trouble when she walks. Have you looked into her parents genetics? Perhaps there could be a clue there to help you figure out what is wrong with her? Often health issues or traits can be passed down from one generation to the next so if you looked into their health history perhaps it would give your vet a clue as to what to look for with your darling little girl. I hope whatever is wrong with her that thare are able to make her better soon! Keep us updated!