Keep pushing on medication. Push and push and push. The main ones I have heard about are stemetil and cyclizine. I was on stemetil for 35 weeks of my first pregnancy.
I also terminated my unplanned pregnancy last year due to HG. The moment I found out I was pregnant, I knew I couldn't go through another HG pregnancy without a hell of a lot of planning and support (which wouldn't have been there at that time) and my DC being pretty much school age, rather than a toddler.
If you do decide to terminate, please please don't think about the whole 'other women had worse sickness than me and managed'. I know mine wasn't half as bad as some women I know about - but it was bad enough for me. You make a decision based on what is right at this time.
However, it sounds to me like you would prefer not to terminate. HG is soul destroying and yes, it clouds everything else in your life.
It is ok if you decide you can't go through with this pregnancy right now.
However, from the way you sound, I would keep pushing with the doctors, with the midwife, maybe even try and go to A&E/maternity ward if you start feeling very rough, try to get someone who will give you the meds as for many women they can at least make it bearable. Not great, but bearable.
If you decide to continue with your pregnancy then find the HG support thread as the ladies there are wonderful. But if you decide to terminate, please remember you are not alone