Almost The End (Reaper!Sans x Teenage!Reader)

It's been three years since the doctors had diagnosed you with an incurable disease, which they had not named since you are the first patient that had ever had it. Randomly, your body would start hurting all over, your eyes felt like they would be on fire, and your limbs felt like they were being torn off. You have endured the pain for a long time, and felt like it's almost the end.