Headache

so im probably just over thinking it, but i have a thing when it comes to brain stuff. ive had this weird stuffed feeling in my brain since yesterday. my ears feel like they need to pop and im irritable to sound. like it doesn't hurt to hear it but it pisses me off a little bit. my eyes also feel like theres a pressure in the inner corner. my period was late by 4 days but i got it today, but even so ive never experienced that because of a late period. ive always had low blood pressure because im vegetarian and experience anemia problems every once and a while (i haven't been tested recently). but me being me, i thought it was a tumour or something. i think it could just be sinus, as i feel it mostly in my forehead and around my ears/eyes, but i can't go to the GP but need some form of comfort i guess. what are your opinions? thank you <3