nausea

So I didn't get much morning sickness when I first found out I was pregnant around 4-5 weeks. I'm now 9 weeks and throwing up more frequent. It won't last all day but throughout the day I'll throw up maybe once a day. It could be the baby not agreeing with what I'm eating maybe not drinking enough water bc I've been on vacation. I just don't know. Is that normal to not throw up so much in the beginning but now I am? What do y'all suggest I do differently? Has anyone had this problem?