Brain Tumor symptoms.

I have been experiencing a constant headache for about 2 weeks now and i have never had it before, i think its worsening becuase im starting to feel a pressure in the left side at the back of my head, i think it might be a tumor but im not sure, my mother had a tumor in her ear when she was 24 so im really really concerned all the doctors just give me pills for the headache and say it will be better in 2 days, but nothing happens. please help me .