Yes, there are people who have constant nausea which is really, really bad, and sometimes people consider termination because of it - much like Hyperemesis, in fact it's still called Hyperemesis even if you aren't being sick.
I had it both times, and had various drugs for it. Cyclizine didn't work for me, stemetil wasn't too bad, metoclopramide was probably the most helpful but I wasn't prescribed that, only given a jab of it once.
Staying hydrated is the most important thing - it REALLY helps, so don't worry about food, just try and keep sipping. I actually found ice cold milkshakes (just milk with some sweet stuff added, not thick milkshake from the shop iyswim) really relly helped as they gave me some sugar but weren't actual food. Couldn't stand the thought of bread, pizza, crackers, anything like that. I suspect I would have felt way better if I had been better at drinking, but I've always been rubbish at drinking enough.
People who have been into hospital to be rehydrated always seem to feel so much better afterwards for at least a few days. So I think if you can manage to drink, you will be on the right track.
I used to sip a glass of freezing icy milkshake and not eat for several hours - and it made me feel I could actually eat, after that. Hydration is crucial.
Good luck, and don't wait to start being sick - see your GP now, get something prescribed. If it doesn't work, get something else. Phenergan is usually what they start you off with.