Help!!

I was on tray 6 of 10. One night, I accidentally fell asleep without my retainers in. After this, I noticed the one tooth that I am trying to move, is no longer tracking. I then decided I would go back acouple of weeks to try to fix this. So, I went back to my week 4 tray to see if this would help any. It still did not fit correctly. I just tried on my week 2 tray & they are fitting good. Would you just start all over basically? Or should I be telling my dentist and asking him for advice? I was going to just start over, but that might not be ok? Idk what the rules are 😂