I’ve been suffering from pressure and pain behind eyes for almost three years?

I am a 18 year old girl who has been suffering for pressure and pain behind eyes for almost three years. At first it came in periods during the day, but for five months now it has been a constant paind varying between weak and moderate. It is at its worst when I wake up (which makes my mood negatively effected by this) and when I lay flat down. It also hurts severely when concentraiting, and especially when looking up.
I have had no surgeries or been diagnosed for any sicknesses before. I do not have any other symptoms except from getting tired of the pressure, making me having to sleep on daytime.
Do you know what this could be?


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