Was in similar position as you: Wales, had to wait 10 days for pills, with an under-2 toddler, extremely sick (had hyperemesis in previous pregnancy).
By the time I took the pills I was 7 weeks gone. The wait for 10 days for the pills was agonising, I was literally counting the hours. Thank god my husband works from home and could take time to look after our toddler.
In terms of the sickness, just keep sipping whatever fluids you can. As you're planning on termination, there's no harm in drinking caffeine drinks etc. Personally I couldn't tolerate water, but full fat coke and fizzy water with blackcurrant juice kept me hydrated. Just drink whatever you can. I say this as someone who had to be hospitalised due to dehydration during my first pregnancy with my now toddler.
In terms of the experience itself - because of the health board I live in, I had an hour's drive each way to get to the clinic to pick up all the tablets. My husband drove for that hour, how on earth I managed the journey with severe sickness I have no idea. I just nibbled on dry toast all the way through and took a bucket with me just in case.
I took both sets of tablets at home, 24 hours apart. The main problem for me was keeping the first tablet down for 3 hours - ie not vomiting. I managed to do this by keeping absolutely still in front of the TV and just slowly sipping fluids and nibbling on dry toast.
I inserted the 2nd set of tablets inside me 24 hours later. Bleeding started within 3 hours and was heavy. I suffered the loss about an hour after that. Bleeding then calmed down and went on for some days afterwards but quite light. Some cramping for the first hour of bleeding but I wouldn't describe it as bad pain to be honest. They gave me cocodamol to take for pain but I didn't need it, I just used a hot water bottle and that was sufficient. I also kept hydrated and got my appetite back whilst bleeding as the sickness subsided so could munch on healthy things.
No other side effects of the tablets. My pregnancy sickness eased after the bleeding started, so much so I could eat things I hadn't been able to for a couple of weeks previously.
I took a pregnancy test (which the clinic gave me) 3 weeks later which showed it had worked. My period arrived 4 weeks after the termination.
In the immediate week or so after the tablets I ensured I ate lots of things with iron in because of the blood lost.
Best of luck to you YnysMon