I can't stop fretting about this and need a conclusion before I can go to sleep!
DD turned 2 this week. We had planned a party at home for tomorrow and invited 4 of her friends. This morning she was sick twice and kept lying down and being generally unwell. Bearing in mind that last time this happened she was sick every day for a week, and knowing her nursery has a 48-hour rule, I thought it would be a) sensible and b) the done thing to let everyone know that we would move the party to next weekend.
But. 3 people won't be able to make it, and I don't have any contact details for the 4th. As this little girl is in DD's group at nursery, I asked them (by phone, DD stayed at home today) to ask the parents to ring me (they have my number from invitation). But I haven't heard from them. So now I don't know if they will turn up tomorrow. 
The other thing is that since I contacted people DD has been absolutely fine! But I've already told 3 people that she has been sick, so I can't reinstate the party, and also it might be too short notice, and they might worry I'm being irresponsible in case she is contagious.
So what do I do? Has anyone else ever had to cancel a birthday party? What do I do if the little girl turns up tomorrow with her parents? Should I assume she will and prepare accordingly? Should I try to find a new date for the party which suits everyone else? Should I just completely cancel the party as doing anything else would look desperate?
For future reference, did I do the right thing by letting people know, or is it ok to wait until the morning of the party and just not tell people DD has been sick? (I didn't think it would be very polite to do this.)
Birthday party etiquette is a minefield! Help please!!