So lost and don't know what to do!

I am completely broken. Today I am 22 weeks and went for my anatomy scan and they found that my daughter has cysts on her right kidney. They said she is perfect otherwise but one kidney will not function. Everytime I think about it my chest starts to feel funny and I start crying. I have to go back at 28 weeks to check how its developing but until then I just feel completely lost. My partner says that everything will be fine and not to worry but it's too hard. I don't know what to do I just keep crying.