I am 12 weeks pregnant and have had a headache for the last 3 days. I have tried caffeine but have to be careful cause it causes heart palpitations. And have tried tylenol. Every 6 hours I take tylenol. It is doing nothing. Even after sleep it doesnt go away as soon as I wake up my head is killing me. It throbs when I walk, talk, chew food anything I do and its throbbing and blistering pain. Has anyone else experienced this. I will be calling my ob today to see what they suggest.