How to Tell if Invisalign is Genuine?

I went in yesterday, but am doubting that I got Invisalign. I have friends who have it and theirs is barely noticeable while my trays are extra thick.I can't close my mouth all the way, and you can see a big line of plastic in the middle of my teeth. Also my lips pout a lot. The trays seem to pop up from my teeth.Dentist told me to go back until a month later but mentioned nothing about new trays. Is this normal? I heard Invisalign has the little brand name stamped on the trays (which mine doesn’t).