On the first day I got my Invisalign my dentist did an IPR between my two front teeth, and it left a pretty big gap. I was told that the gap would close within weeks and it would go back to normal. However, there is still a gap. My right front tooth is clearly straight, but the left front tooth is definitely crooked. Why does it look this way? Did my dentist perhaps botch my left front tooth while doing IPR? And if so, how can my dentist fix this? I'm almost finished with tray 27/30.