The TPMS light will not turn off?

Two days ago, I got in my car and started driving. I realized I had a flat tire, so I pumped it and made sure I didn't hear any leaking air sounds. I proceeded to go to work. Later that same day I find the problem; I see there's a little screw in my tire. I take it out to fix the puncture and pumped it back with air. Then after the fix my TPMS light came on, not the low tire pressure. Just the TPMS light. I have tried checking all my tires and none of them are 2.0 psi less than the recommended. It's getting colder now where I live so I'm not surprised by the little fluctuations. I have driven a few miles over the last two days and still the light hasn't turned off. I don't know what to do anymore.