My Invisalign is not very tight. Should I be concerned?

I am on day 2 of invisalign and they fit not loosely but nothing feels like its changing. I am also using acceledent so each one I wear for one week not 2. I have packs up until week 6. For fun I tried on week 6 and it feels like it fits the same as the one I am wearing now... should I be concerned??

No doctor answers yet