I'm so sorry for you. I know how you feel, I haven't spent nearly as much as you on Stormy YET but I have went through hell the last 8 months that I have had her. We have had lots of vet visits and seems like each time something new is wrong and it just goes on and on. It is extremely stressful and at times I was like I can't take it anymore!! It is so hard. We have been lucky to have no issues so far since April. But I am keeping my fingers crossed.
I hope Tatum recovers and does well. As for the baby tooth, is there something you can do to help it fall out? Stormy had two baby ones they wanted to pull out and right before she turned two they both fell out.