severe headaches

Cc
I'm just about 16w and I've been having headaches/migraines for a few weeks off and on, this last one has lasted since Tuesday and I can't seem to get rid of it. It's now brought me to being neasous, irritable and dyhrated.   I haven't taken anything for it except rest and water/Gatorade. Wondering if anyone else has gone through this. I am breaking down and taking sometime tonight since I work 7-7 tomorrow, I need some good sleep. Any advice!??