I had Botox for frown lines. I laid down when I got home for a couple hours and now heard I should not have! Did I mess it up?

when Botox first got approved for cosmetic use the FDA-approved instructions incouded telling patients not to lay down afterwards, or bend over.  About 10 years ago, at a National Education Faculty meeting, it was deemed unnecessary by a consensus of trainers such as myself.  The only thing you should not do afterwards is rub the injected areas for 4 hours.  This is to avoid permeation into the eyelid muscles which can cause a droopy eyelid.

Staying upright, no exercise, contracting the facial muscles...these are all recommendations post neurotoxin treatment.  I can guarantee patients receiving Botox and Dysport treatments forget to do these things all the time and still have fantastic results.  I do recommend strongly no direct pressure on the treated area, no facial/massage in the 24 hours after receiving a neurotoxin treatment.  This allows the product time to settle into the muscle without manipulation from extrinsic factors.  I'm sure you are on your way to a softer, smoother, more rejuvenated you!