Dee can you describe to me how she is shaking? Is it uncontrollably? Does she seem a bit out of it or dizzy after an episode? It sounds to me like your pup may be having seizures and really needs to see a vet. If you are having problems financially my best advice to you is to call around and see if one of the area vets can help with a payment plan or if they would take a look without money up front right now beings there is a possibility of seizures. If she is pregnant the risk is even higher. She could have Eclampsia, which, while normally found in humans can affect animals as well if their blood pressure gets to high.
If you cannot pay to have the animal treated then I am afraid the best thing for you to do is take her to someone who can help her. I understand you don't want to get rid of your dog but it seems to me your being a bit selfish. Your other dogs have each other and you. They're not going to die if you take one away. This is for the best of her health. It will be harder on the other dogs if she is in pain or dies at home. Do the right thing.
Life's not about how to survive the storm, It's about learning how to dance in the rain.
Momma to: 2 human children Audree (2) and Jacob (7 mo.)
3 Doggies: Angel (13), Cricket (1), and Diesel (4mo.)
1 Kitty: Mazey (Age unknown)
2 ferrets - Mocha and Marshall
1 bunny - Ice
Working to make a change, one paw at a time!
Volunteer - Skinny Little Buddy's Rescue