Not from two doses but you could wake up with one hell of a dripping nose.
Drink the bottle.
@324,139 (HaikerensGuide !0VegJ9Jl.Q)
Not robotripping, thanks. I like having more than 4 brain cells.
Edit: I don't think NyQuil has dxm in it but the point remains. I don't abuse medication, thanks.
(Edited 3 minutes later.)
You'll be fine.