wow did this hit home for me i just dealt with the exact same thing my mom had to force me to make an appointment about swollen lymph nodes under my jaw i had an x-ray ultrasound ct scan where i learned i may be allergic to iodine fun stuff and finally a biopsy   i was ready to get the call of them saying it was malignant and i guess i got lucky i am also 26 and health and active  i understand and have felt those feelings on the sleepless nights   this whole process is actually what prompted me to stop procrastinating and start seeing a therapist mental health is also important   i wish you all the luck and i’m sending good vibes your way on your journey to recovery ‍