Did your dr put you on anything while waiting for the Humira? Have you been completely unmedicated during your initial flare/diagnosis? If so, I feel for you. You didn’t need to be left suffering without any treatment in the interim.
I have 2 kids who have serious autoimmune disorders (Lupus/Sjogren’s/RA). They were both put on prednisone immediately, plus methotrexate and plaquenil bc the RA was the immediate diagnosis while they waited for testing for Lupus (for lack of a better descriptor. This process took months.) Only when those drugs didn’t seem to reduce symptoms or diagnoses were morphing were biologics discussed.
FWIW, when you go to college, get your rheumatologist to write the disabilities office for accommodations. You should be approved for extra time for testing, laptop use, excused late arrivals to class, transportation between classes, etc. You might not need the accommodations at any given time, but they are good to have in place in case a flare occurs during the semester.