Need help! Severe headaches since 3 weeks

Hira
Hey everyone! I've had severe headaches since 3 weeks now. They stay day and night. I tried taking Panadol (alternate for Tylenol) it mostly doesn't help. 
Just asked my doctor here she told me to try PreMedol? Has anyone even heard of it? she said if that doesn't help I should go to a neurologist. I don't trust my doctor 100% she only gave me 30 seconds on the phone so don't want to rush into any meds.
My blood pressure has been on the lower side but no dizziness. I'm 14 weeks and 4 days now.