Family is sick 3 days before vacation

My 1.5 year old and me started having a virus or something yesterday. Throat, nose, all the things. My husband just recovered from it. We’re supposed to fly to vacation in 3 days. The trip is not refundable and not changeable. What do I do? Any tips on how to recover quickly? I also have a toddler who doesn’t seem sick at all. I’m worried about flying with clogged sinuses for them.