I am so sorry, your baby is going through this.
I actually had whooping cough last year. I was sooo, ill. Went to the hospital 2 times. There really were times when i could not catch my breath. Lets of rest and medications and we were able to beat it. it took me many many weeks, to get my strength back.
I would cry, because I kept thinking of the babies and children who had gone through this, It is very frightening.
The hospital is not going to allow your child to go home, unless they are sure she is going to be alright. They are going to help you with the medications and the different things you will need to watch for.
Once you go home with her.. You must try to get rest. You could always place a palette on the floor of her room or move the crib to your room so that you can hear her.
It is so hard to see our children suffer, but we stay strong and get through it for them.
If you need to call family to come and help so that you and your husband can get rest, Do IT.. this is the time to call in the troops if you need them.
i am sending you all strength.