Hi! I know what you are going through. I get so anxious going to the dentist that my stomach is in knots and I can't eat or sleep.
The doctor that did the perio treatment on you should be seeing you for a follow up and maintenance treatments. Do you have another appointment with your dentist and did he tell you what type of treatment you needed, other than the scaling?
Try to hang in there, I keep thinking it must get better!