Mom, you need to calm down. Do not allow your children to see you so distressed. They depend on you for their stability..
This was a very scary thing to happen.. It is as bad as if your child fell off of their bike and hit their head on the street. These weird accidents happen all of the time and I promise.. this is just the beginning.
When these things happen it takes all of our will power not to completely freak out and lose it. But you must find your strength and wait until it is all handled and do your freak out away from your children.
I am also going to guess, your daughter was already coming down with something.. this just is all a coincidence that she has a fever.. also her lack of sleep.. etc..
In the morning, you need to start being very positive. If your children bring up the incident, just talk about how good that everyone is just fine.. No one was hurt. It was a little scary for that minute, but look, no bodies were hurt!
What an adventure.. Not many people have had this happen.
Your 5 year old will remember this a bit when she is older.. The 2 year old will not have any of his own memories, just what you all will continue to bring up..
Just begin to just listen to what your daughter says about her feelings. And then tell her, she is just fine and this is not going to happen again.. Also promise that the next bouncy house you all run into.. YOU will join them to show them it is safe. Accidents happen. This was not done on purpose.
You all need to have some quiet days, with playing in the park, maybe splashing in the pool.. It is good you will be seeing the doctor, but once again, do not have a dramatic recounting of the event in front of the nurse or the doctor.. Maybe write it out and give it to them before the appointment and let them know your children are still upset.
Help them move on by validating it was scary, but they are fine and so are you..