I have what seems to be an infected hair follicle on my chin. It's affecting the left side of my face.

See doctor. Sounds like you may be developing a skin infection. You may need treatment so see doctor right away before it gets to advanced .
Need consult. If the lesion is "affecting the left side of face" then you may need antibiotics or even an incision to drain the lesion. A primary care provider could examine you and make the call. In the meantime I would wash with a wash cloth and soap and water. Happy healing!