Excessive vomiting?

I'm in my third trimester, 35 weeks and have been vomiting entirely everything I've consumed for the day. I've been a little dizzy, feel like something is weighing down on me here and there, headache all week. It was up until tonight I cant keep water down. What should I do? Through out this entire pregnancy I have had morning sickness, some days were easier but as of lately it seems to be so much. I've stopped consuming as much daily and even lost my appetite bc I know I'll throw it up later