I can totally relate Clare, a lot of people say "oh I hate this morning sickness, it's horrible" but with HG it just takes it to a whole new level and it's really hard to explain to others exactly how debilitating it is to spend nine months feeling absolutely shocking every minute of every day and knowing that nothing is going to make it go away except giving birth.
My HG was probably about the same in both pregnancies, I don't know if my second continuing pregnancy would have been as bad had I not been having twins, it might have been easier, but both times I was sick the whole way thru.
Yes it was horrible, I became very antisocial, some days I cried coz I couldn't get out of bed, but at the end of the day I have my two precious wee girls to show for it.
My only real advice I guess is to have support systems in place before you fall pregnant again, that way you'll be prepared if you do end up with HG again. I was lucky that Maya was old enough to be fairly independent, days when I couldn't get up she would get herself out of bed and turn the TV on and watch cartoons until I could drag myself out, and also that she is at preschool four days a week which gave me time out. Don't sweat the small stuff (dishes, washing etc.), I found if I left the housework long enough Willie would eventually do it
I also conned my GP into doing IV rehydration at her rooms so I didn't have to go to hospital coz I was determined not to end up in hospital.
That's about all I have, except that I don't for a minute regret doing it all again, it's amazing how quickly you forget the bad bits.