Go to see GP. You need to keep fluids down and if you are not holding much down you might be dehydrated. Even if you are keeping fluids down, you may still be dehydrated.
I suffered from hyperemesis this pregnancy and it was horrible. I put it down to 'morning sickness' til about 10 weeks or so, and felt so so bad I went to gp to get a couple of days off work to try to recover, was told I was severely dehydrated and should be in hospital. I managed to avoid it by promising him i would try a few more things and go back the next day. Luckily i improved enough to avoid hospital but only just, and had to be medicated at 14 weeks as I was holding nothing down.
There is a good website www.hyperemesis.org/here with some advice and suggestions on how to manage sickness and nausea.
I found, myself, the following helped:
Apples - contain anti-emetic properties. cut into peices and eat little bits at a time.
Sharp/Sweet drinks - grapefruit juice (if it does not give you heartburn)
Fizzy water, rather than sweet fizz, and through a straw
hula hoops
smoothies
Plain fish - cod/haddock with no seasoning
plain mash potato/boiled potatoes
plain pasta - nothing on it, not even olive oil.
On occasions, sucking on a lollipop helped with the nausea.
Keeping calm, getting plenty of rest.
Ice cream - to start with, quickly went off it!
Things that made it worse for me:
ginger (i got very annoyed at anyone who suggested ginger biscuits!)
garlic - the smell alone did, and still does, make me vomit.
Spice
Flavour of any kind
sweet drinks like cordial
sweet food/chocolate.
lucozade, although this actually helps some people
Stress, emotional upset, tiredness
I am now 37.5 weeks. I am only sick a couple of times a week, and usually tiredness related now, but have food aversions still and cannot wait to be able to eat normally again.
Don't ignore it, or think you are being silly in any way, it can be so horrid, either being sick, or feeling sick, and I hope it goes away quickly for you (usually by 17wks if not before, not often goes passed that point, honestly).
Hugs to you and take it very easy.