Nauseous

I'm in my 13th week but still feeling nauseous. Sometimes it's a false alarm (vomiting nothing or water) but sometimes there's food coming out. Most of the time, I realised it's because of the after-taste of food that's still lingering in my mouth after meals that made me nauseous.. Despite all the typical advises that most mummies shared (e.g., take small but more meals, eat fruits, don't go hungry but eat plain crackers if really no appetite, using peppermint essential oil to relieve nauseous feeling), it's still not helping me and I've lost 4kg so far though gynae said not to worry about weight loss. I'm really hoping I'm not the unlucky few mummies who experience nauseous all the way till delivery. However, if I really am, I'm wondering how you mummies do it. Hope to hear from you!:)