Holy Moly Headache!! Help!

Stephanie • Naturally delivered our rainbow baby boy in July 2015 💙 and currently expecting our second due in October!
I drink water all day long and I'm 5.5 weeks along. I never got headaches and now every night around 10 pm I get one. 
​Really want to steer clear of medicine but does anybody else get these this frequent and if so, what are some ways you relive the pain??!! HELP!