No problem at all. It's never easy losing chicks. I hope it helps.
If you're using medicated feed and theyre eating it, you dont need to use the corrid in the water as well. Just one or the other.
I also forgot to mention eggs. If my chicks will not eat, I will cook some eggs and put it in a syringe then squeeze it out in front of them. They will usually peck it then go nuts when they realize its food. If not, I will sometimes force feed them by opening their beak, squeezing some in and then shutting their beak. Enough to fill a little of their crop. It will keep them alive and give them energy.