My hg lasted til around 25 weeks pregnant. Some people it is the entire pregnancy.
The baby will usually take everything from you, before your body gets anything, so bub should be fine. Even with the weight I lost my girls were 7lb 5oz, 8lb 9oz & 7lb 9oz.
When you have hg all pregnancy symptoms are exaggerated. So you'll be exhausted as well.
You may also become anaemic, so it's a good idea to have your iron levels tested & see what dosage of supplements the doctor recommends. This will make you feel tired & dizzy on top of the exhaustion & dehydration.

I had an allergic reaction to maxalon, 3 times, so couldn't take it. I can't remember why, but I didn't try zofran. I remember talking about it, but for some reason that's as far as it went.

Be warned. Some people really have no sympathy to just how sick you are. That makes you feel better when you struggle just to shower every day, because you can suddenly smell the water :/