@meg232xx my Dad (a retired doctor!) always told me that if you can see the pills in the vomit, it's fine just to take another dose right away. I was told the same thing in hospital. You might have better luck keeping the second dose down if you've just been sick.
If you are routinely vomiting the meds, though, you probably do need to be in hospital so they can put them in IV for a while. When I was vomiting relentlessly, I had the impression that my digestion basically "stopped" anyway: I mean that even if I did manage to go a few hours between vomits, what came up looked intact, as if normal digestion just wasn't really working.
The other option is to ask if you can have any or all of your meds in suppository form (to put up your bottom). Bit undignified, but can be a much more reliable way of absorbing them. I'm in France, where everyone loves suppositories (weirdly!) so you can get everything that way, but the drugs you are on are probably available in that form too if you can get hold of a GP. (Or alternatively, if you end up in hospital, you could ask about being discharged with drugs in this form -- hospital pharmacists can be quite creative in my experience and like a challenge!)
From my side, still quite good news. Day three of Xonvea here and I haven't been sick since I started taking it at Tuesday lunchtime, which is v. good news as I had just that morning started the two-hourly vomiting which is usually the beginning of the end for me. I had been really struggling to eat at all, and noticed that I had already lost a couple of kilos (not brilliant for six and a half weeks) but today has actually been better. I bought some Coke which really helped a bit. Don't think I have drunk Coke since the last time I was pregnant, back in 2014/15!