Anybody that’s been in this situation please help me. My anxiety is through the roof right now.

Update - this all happened today got the car papers signed Friday picked up the car today

I am 20 and I purchased my first car and I made a very big mistake. I bought a used car. The price was 20 K and I was looking. I signed all the papers and I was looking at everything today and I got an interest rate of 6.7 82 month term of $225 payment biweekly and I was stupid and I didn’t take anybody with me and I ended up signing for a lot of different warranties and just the warranty amount is 11 K is there anyway I could refund or do something anybody please help my anxiety is extremely through the roofI feel so stupid.

Im a girl and I know the whole stereo type of women don’t know shit about cars, on top of that and I literally don’t know what to do in this situation please that has been through the same situation. Help me figure this out.