Even if you had a c section, all the fluid is cleared by six days. You can try getting a little nasal sucker and auctioning her nose if you think it is that. Does she feed well and putting on weight? This is a good way to tell if she can breathe properly as babies have to breathe through their nose, so if nose is blocked they can't feed. If it is still there in a few days I would suggest getting her checked out again.
She is feeding very well, gained 400g since leaving hospital. She also has a bit of facial jaundice though.

I will try that little fesses (gosh at least i remember what the brand is now!)

We will be getting her checked out next week if it continues but the doctor was more worried about her jaundice than her "gasping"