Call your doctor. My doctor told me if I had a bad headache that wouldnt go away and Tylenol didn't help to give her a call, I believe its a sign of precamsia
Tybelo has been know to increase the neurons in the brain making the headache worse I take multi symptom pamprin or midol even when not on my period
Make sure you're drinking water try a cool rag on your head or a lavender bath.