<human>: Can you summarize the given text in a few sentences?

So quick story...I had a piece of my tooth break off and panicked and tried to find a dentist to take a look at it. I find a place nearby that had good reviews on Google. 

I had never used my insurance for my teeth ever, I had no card, I had no member ID. All I could use was my SSN to acknowledge I was covered. 

I visit...I'm told I need a root canal, deep cleaning, etc. it's gonna be like $2200 out of pocket. 

I am probably visibly amazed by this and we're discussing insurance and how to pay, etc. she mentions care credit and I am familiar with the concept due to being a pet owner. 

Anywho. We go back to talking about insurance and she asks "do you want me to see if you're approved?" Great, I'm thinking she needs to get the procedure pre approved like at a doctor. 

She makes a phone call, has my SSN from my new patient forms. None of this is raising a red flag at this point and I'm distracted getting this document pushed on me to sign for the procedure. It's been like 10 hrs since my tooth broke and now I have a laundry list of work to do and I am very confused 

She then asks me if she can say I gross $4k/month. Im confused by thst and tell her "sure". No clue why she was asking

"Great, you're approved for $15k"
"Wow, insurance will cover that much?"
"No, care credit. Your cards will be in next week." 

I just groan at this point. I feel dumb. All the pieces fit together. 

I'm assuming this affects my credit. Should I close this line of credit? Or is that worse for my credit score? 

P.S. I got a second opinion after reading nightmare reviews on Yelp. I didn't need anything they quoted out. They were compete hustlers.
<bot>: I'm dumb and got hustled by a dentist who opened a $15k line of credit for me for work I never had done or required.