I have one tiny whitehead above my lip in the mustache area. Been there for a few weeks and I cannot get rid of it.

Any suggestions?

I've heard of using witch hazel, but there are other ways, but don't pop it....................
https://www.healthline.com/health/beauty-skin-care/how-to-get-rid-of-whiteheads#general-tips

If it has been there that long, probably time to see a dermatologist

It might be an ingrown hair.

Lemon juice is a popular home remedy for a number of ailments, including acne. Lemons contain antioxidants, which is a form of vitamin C.
You can try this, hope it helps you.

It's prob not a simple whitehead if it's there for so long. Maybe a small cyst or something. You can risk popping it yourself (and lead to scarring/infection), but safest bet is to see a dermatologist.