~Please Pray~

I can't write much today....I just wanted to let everyone know that I have a very sick kitty at the vet today. Her name is String. She is sixteen, and was diagnosed with Hyperthyroidism about a month ago. My vet put her on thyroid meds immediately. He started her on a high dose because her thyroid level was double what it should have been. I asked him when she needed to be re-checked and he said one month. She has been fine...up until this morning. She was vomiting, lethargic...she crawled into our shower stall after I had taken a shower this morning and just lay down. This is a cat that has never refused food, not in the sixteen years that I have had her. She would not eat this morning. Hubby and I took her to the vet, where she is on IV fluids. The vet is saying that she clearly has liver damage, as she is jaundiced (I didn't notice that this morning). My frustration is.....why did he wait so long to re-check her? I think he should have re-checked her thyroid level 7-10 days after she started the medicine. It will be a month on the 15th, and she has been taking 10mg a day of methimazole, and now she is sick because she has had too high a dosage of it, and it is destroying her liver.
I said I couldn't write much but all of this is boiling out of me now.....Please keep her in your prayers. She has been with me for such a long time.....and I know I will lose her at some point. But if I lose her because I overdosed her, I won't be able to forgive myself.
I will write more when I get an update from the vet.
Thanks everyone......