Still vomiting at 16 weeks 4 days

Started vomiting at week 6. At that point of time i was vomiting whatever i ate. Got better somehow at week 12 / 13 then it came back. But this time i throw up some food. And its all day nauseous. Now im 16 weeks and 4 days im not quite sure when it will stop. Its very tiring and it really demotivates me to do work. Drains my energy and sleepy all the time. Usually when does your vomiting stops? Or is there anything that can help my situation? #pleasehelp #advicepls