Op this was me this time last year, in fact I spent most of Easter weekend in bed as I couldn’t move without being sick.
Constant nausea, daily sickness and severe food aversions are awful and absolutely affected my mental health. It was impossible to enjoy anything and I completely felt like I was failing my 5 year old as even providing basic care was honestly a struggle. I desperately didn’t want to be pregnant anymore even though the pregnancy was tried for and very much wanted.
Gradually I started to feel better, I think the nausea peaked somewhere between 11 and 15 weeks and then slowly started to reduce. By about 25 weeks I felt almost normal and the end of pregnancy was so, so much easier than those first awful weeks even though my bump was huge & very heavy (9lb baby at 39 weeks)
I now have a beautiful 5 month old and wouldn’t change it for the world, I am so very relieved that I persevered and got through it.
When deciding whether to continue or not try to think about the end result, if the pregnancy was planned and baby wanted then please seek all help possible to try to reduce the sickness and access more support. Talk to your midwife, hassle your gp, ask to see another gp if yours isn’t supportive.
I have no experience of termination so can’t help with that but it looks as though you have already received some really good advice above about what would be involved if you go down this route.
Not sure if you have seen already but there is also a hyperemesis support thread here on mumsnet full of ladies suffering awful pregnancy sickness. Definitely worth a read as following this when I felt so awful last year made me feel just that bit less alone, even though I was never brave enough to post.
It is truly awful when you are in the thick of it and you have my full sympathy.
Good luck with whatever you decide, really hope you start to feel better soon.