headache tips?

i have headaches daily, for the past 3-4 years. i think it started after i randomly got a migraine in the middle of the night, and ive had migraines 2-3 times a year since, sometimes its not that bad, sometimes i have to huddle around a toilet/trash can shrouded in silent darkness for 12hrs. but it fucking sucks. not sure if the headaches and migraines are related, but i’m basically living off of Tylenol and caffeine(it helps more than i thought it would) and i don’t know if my liver will give out first, or if my heart will.

i cant go see a doctor, and i don’t know what else i can try. i can barely get through classes when i forget to bring painkillers, and i think one of my teachers suspects that I’m taking drugs. any ideas?