I have had a hard lump on the top of my skull for around 5 months now, i had really bad headaches/ migranes for around 8/9 weeks constantly. The headaches have eased a bit recently but im always very tired and have to nap atleast once/ twice a day as im feeling very weak even if i go on a walk which i used to find quite easy and realxing my body feels very heavy and as if i cant carry my own weight. should i go to see a GP?