I have suffered from headaches for the last few years and recently was prescribed some migraine tablets which seem to work after taking 3 of them. (It never goes after the just the 1.) anyway since last night I gav had this migraine that just feels different. It feels like a bubble in the back of my head tht needs to pop, the pressure is unreal and no tablets are shifting it. I was wondering if anyone else had experienced anything similar, ive googled it as its told me everything from a Brain tumour to depersonalisation and derealisation disorder 
obviously I know this isn't the case just wondered if maybe I should ring out of hours Drs. Thanks in advance x