headaches during pregnancy

i'm 17 weeks and the last week or so i've been getting a headache every day. theyre not bad and i've been trying not to take tylenol but they just last like all day. is it just due to hormones and increase blood or maybe i need to drink more water? if anyone has any tips to help please let me know!

edit: i eat within the first hour of waking up and i eat plenty throughout the day as well, i only drink water but i know i should definitely be drinking more