Hi Caz Congratulations! Butsounds like you're having a rough time already I think if you've lost 2 kgs already and you're only at 4 weeks it could be time to see the doctor. I let things go too long with my last pg, I put doing better this one down to getting to the doctor early and getting the right meds. I hate taking anything but a
malnutrition and dehydration are not any good for you or your baby either.

You could wait a bit longer if you want, you may just have bad m/s and it might settle but it can't hurt to be prepared if it gets worse. Are you taking any Bvits? Sometimes that can help, if you can keep them down of course.

You might even find a short dose of something will help you. I had a friend who was really sick around 7 weeks threw up every time she went in the car and most of the day at home for a few days. The doc gave her Maxolon which she took for a week and she's been happy and healthy ever since with no meds at all.

One of the main markers for diagnosing HG is rapid weight loss, losing more than 10-15% of your pre pregnancy weight and still not improving.
So if you're happy to wait a little more then you, can just try to stay hydrated. That's really important.
I hope you don't end up with HG but keep a close eye on yourself and see your doc if you don't start improving.

Maybe some ginger tea will help if you haven't tried it already? it made me sicker lol but I tried everything before I went to meds the first time