Hi happy. I am so, so sorry for what you're going through right now. It's such a shock when you find out it's not going well. This is almost exactly what happened to me - had a private scan at 7+5 to find only an empty sac. You've had good advice from the others here.
I hope you have a referral to the EPU now - they will look after you. Their guidelines normally say you need at least 2 scans a week apart to be able to offer you any medical or surgical intervention, because they are not allowed to go by the dates you tell them in case there's a 1 in a thousand chance you might be wrong and they stop a healthy pg. Sometimes they won't take a private scan into account, so you need 2 at the EPU, so getting this process started before you go away if possible will be helpful.
It is also possible that the sac is still growing - this is what happened to me. Although no embryo was ever visible and they weren't saying the pg might be ok, they couldn't treat me until there was no growth at all 2 scans a week apart, or sac is over a certain size and empty. This may not be the case with you, but wanted you to be aware of the possibilities. Cruelly it can be quite a drawn out process.
Like you, I also chose to go away on holiday. I'm glad I didn't just sit around waiting, but I mc naturally while I was away (in a tent...) so that might be something you want to think about. If you want to go anyway and be prepared, take lots of massive sanitary towels and some strong painkillers. The EPU might give you some co-codamol if you see them before you go away. I hope I'm not alarming you, and really everything was fine when I mc'd but if you're not at home you may want to be prepared. There are some good threads on this board giving advice on how to manage practically and what to expect.
Most of all, just be kind to yourself right now.