Depressed after dental visit

Long story short, I went to the dentist finally after 10-15 years and found out I need about a dozen fillings — only one cavity and the rest abfractions (seemingly worse since fillings likely won’t stay as long). I look in the mirror now and kick myself for how stupid I was not to go for so long and prevent this. 

I’ve always had a fear of death, dealt with anxieties, and some bouts of depression at times, but the past few days since the appt have been the darkest in a long, long time, and I’m beyond anxious of every action I’m taking. 

I could go on forever, but any words would be helpful. I know the whole “it’s great you finally went, be proud” line and it doesn’t work…I know better than to fall for all those bits.

(And the anxiety / depression has nothing to do with money or the pain of the procedure, though I’m sure the latter will come later in the month as I get closer to the first round)