I started having incredible tooth ache, so I found dentist clinic and went there. I had no insurance or anything.
After being quite impressed with the facility, the dentist came and started testing my teeth at the back. He was putting small swab with cold water, but he didn't find it. He told me that there should be root canal, and that I should look for a good dentist to do it for me. I was going to New York on my way back to Poland, and he mentioned that New York have best dentists and that root canal can cost around $2000 there.
It would be cheaper for me to fly back Poland, have a root canal done there and back btw.
Eventually he prescribed me antybiotic which helped. I payed $150 for the visit (down from $250 because I was foreigner I guess?).
Long story short after 2 weeks I went to the dentist in Poland. He did the same thing with cold swab, but this time he touched on the side which I immediately noticed. Dentist in the US touched only from the top, he didn't even bother to touch on the side.
It was root canal indeed and was fixed in 1 visit for $200.