I am on my 7th tray of clear correct. It has gaps, and feels loose. Is this normal?

Gaps between your teeth and aligners, aligner bubble not matching over specific attachments bonded on teeth, aligners flaring away from gumline, overly tight flossing contacts and a more sore tooth that needs to unrotate are all red flags that may indicate you consult your doctor who is overseeing your case.

These gaps should not be there. They are a sign of an ill-fitting tray and that your teeth may not be "tracking" (moving where planned). I would suggest that you give it a day and possible lightly chew on some rolled up pieces of gauze. If they begin to seat fully, you may be fine. If they still refuse to fully seat, you need to consult with your provider. Until you can get in to see him/her, I would put your previous tray in to prevent possible relapse.Caution: you should not experience pain and should not bite too hard on the gauze, as that could crack the aligners. Just some mild pressure akin to eating a sandwich. I hope this helps.

Did it feel loose from the beginning? Or does it feel loose now that you have been wearing it.  If it feels loose because you have been wearing it then move onto tray 8.  If it felt loose from the beginning, or you are having fitting issues, consult your dentist.  You may need to have new impressions taken, and new trays fabricated.

You may need to go back to your dentist, if they don't fit. He can order new ones.Also, place tray 8 in to see if it feels okay. If you are at the end of tray 7, then move on to 8, butif tray 7 was loose when you first put them in, then you need to see your dentist for help.