After rolling my ankle a few days ago there is a dull pain and a little discoloration and I don't really want to go to the doctor what should I do?

RICE. Rice stands for rest, ice, compression and elevation. Fairly good ankle braces are available over-the-counter. Discoloration comes from bleeding, either from a torn ligament or a fracture, so don't underestimate this injury. If improving quickly, then home rehab. Focused on range of motion, strengthening and balance are important. Rehab. Programs may be found online on quality medical sites.
Move. At this point, ice, stretch it while leg elevated and don't baby it. See doctor if not better after 10-14 days.