Cooling/Menthol Sensation

I'm on day 6 post-op today. I got 80u last week. Lately I've been getting like a cooling/menthol sensation in my throat which I'm worried might be acid reflux, but I really don't think it is. The feeling comes on pretty randomly and it comes and goes. Didn't have this before botox. Also, I don't have the standard symptoms for reflux either. No heartburn or chest pain, no sour taste, no increased salivation, none of it. Could it still be reflux? Anyone else experience this?