guinea

Question
i'm wondering why my guinea pig drinks so much and also when we hold her she shakes

Answer
It's normal for them to drink a lot of water, but if they are drinking more than usual it could be a sign of diabetes. But there are other symptoms besides drinking too much water though.
Also is your guinea pig shaking lightly everytime you hold her? She could be purring which make them shake. See if you can listen closely for any purring. :)
I hope I've helped.