Does everyone get a weird sensation in their upper lip after Botox to correct a gummy smile? (Photos)

I'm on day 5 after having my upper lip injected for a gummy smile. 6 units total. I have ZERO weird or uncomfortable sensation that I was told I would definitely have. It appears, from pictures, that my upper lip has lowered some. Does it just take longer to "kick in" around the mouth? Basically, because I have no weird sensation, I'm feeling like this didn't work and am left wondering, should I have them do just a tiny bit more? Obviously I'll wait the full two weeks to see final results.