Advice from mamas??

According to the whats to expect book, it says morning sickness increases by week 8. I have had morning sickness for two and a half weeks now and am 6 weeks and 4 days along and don’t know how much worse it can get 😩 I’ve had severe 24/7 nausea.. so weak and fatigued and each day seems a little worse. Please anyone out there tell me that this isn’t always true and can possibly even go away sooner?!? 🙏