Hello and welcome to the forum!
You have come to the right place for information. There are some very knowledgeable people here that can help you rescue any that need a little help.
What kind of orchids do you have right now? Do you have any pictures of the ones that need help? This will help for others to give advice.
It will also help if you go to your profile and fill in your location. We are from all over the world with very different growing conditions. Knowing where you live will help when we give advice on culture.