I'm so sorry to read what's been going on for the last 2 days!! You must be so scared. I'm praying that they find something with her thyroid so it can be managed and she will have more time.
I don't blame you for being completely upset with the reception staff at the Dr. Lee's clinic. As you said, it's not just that they didn't get a vet or tech on the phone for you but when you were no longer on the line when they returned, they didn't call back?!?! Totally unacceptable. Even if you were a fairly new client there, they should have taken the time to call you back. But you are a client who has gone there for years, and spent a fair amount of money on your pets there and you have just gone through a loss right at their hospital.
I agree that your energy should be focused on Pidge right now and that is what is most important but when the time is right, Dr. Lee should know how things are being handled up front. I'm sure he will address the situation.

I'm so glad you took matters into your own hands and went to Dr. B. though.
Does the lasix make cats pee more to get rid of the excess fluid? I was wondering if on top of everything that she is feeling, if her bladder might be irritated by that. I don't know anything about it though, it's just a thought.

I hope that Pidge will be able to sleep tonight, and you too. And that you will have more answers in the morning. Prayers going out for you and your sweet Pidgelet.