blooming awful
Try this site for advice.
I suffered from a condition called hyperemesis, or excessive vomiting, and stress is a trigger for that. At this stage don't worry so much about what you are eating, it's the fluids that count. If you start to struggle to keep water down, see your GP immediately.
For food, just eat what you fancy. Your body has amazing reserves and although OK a great diet is best, your baby would be highly unlikely to suffer from it. Things like lettuce, melon, ice lollies are all great as they have a high fluid content, and you might find it easier to tolerate hot or cold food. If you ever get a craving, go with it too: if it's junk, well who cares at this stage? Flat coke and lucozade are also supposed to be good (I swore by the lucozade!)
The other vitally important thing is rest: there is a hypothetical link between sleep and nausea. If you are worried about your CVS, I suspect this is affecting your sleep? You must remember to take it easy on yourself. A few days off if you work are probably essential at this point.
Do look after yourself, I ended up on a drip by not doing so. Have a look on the site for loads more info, and feel free to CAT me as I used to be a contact for the charity running the site.
Good luck!
(And take some comfort that statistically you're only likely to have another couple of weeks before things improve!)