Second trimester headaches 💆🏼‍♀️

This whole day from when I woke up to now (7.51pm) I’ve had a really bad headache/migraine (back of the head). I slept for a bit and have been in a dark room most of the day, lights affect my head and make me feel so much worse. I’m not in the US so don’t get all the same medications as most ladies do.

Can someone recommend what I could do? I drink enough water & sleep is fine too.