Hi, I am Dr. Peter and would like to help.
1- How old is your dog?
2- Is she drinking more than usual?
3- Take a look at her gums and see if they are pink like yours or pale?
4- Is her gait normal or not?
Can you take a rectal temperature?
Is she still nursing?
Her symptoms are consistent with "eclampsia" which is low calcium secondary to the demands of lactating and her body not keeping up with normal plasma calcium levels. This is a very serious condition and if untreated can be fatal. You need to take her in to see a veterinarian immediately. They will measure her blood calcium and treat accordingly.
If you have additional questions I will be glad to answer them.