Oyyy, 8 weeks pa lang pero ang sakit na ng ulo, that's rough, mama! A few of us in my mommy group had this din during early pregnancy, kaya alam ko kung gaano ka-annoying, lalo na kung gusto mong mag-take ng meds pero takot ka. Best thing to do is check with your OB pa rin kasi may safe pain relievers sila na pwede during pregnancy, at baka dehydration lang or hormonal changes causing it, but your doctor can tell you for sure. In the meantime, try resting in a dark room, drink lots of water, and apply cold compress sa forehead if it helps, pero definitely don't self-medicate pa.