A couple months about I tripped and sprained my ankle. It doesn't hurt anymore but my ankle is always swollen/ larger than my left one. What do I do?

Damaged goods. A "couple" of months may not be enough time for your ankle to heal sufficiently enough for swelling to no longer be present. Sprains can cause soft tissue damage that in turn makes the ankle somewhat unstable. The swelling is a mechanism to deal with this. An ankle brace, heat and elevation may speed things along. To remove all doubt, have your ankle examined by a specialist.