First never let anybody "pop" your back or any part of your body, they could cause some serious damage. Your shortness of breath
could be caused by a rib that your friend may have pushed out of place. I would recommend seeing a Chiropractor. They specialize on the spine(skeletal system
). Often times you can get on a sliding scale, or even a payment plan. A chiropractor is often less expensive than going to a regular MD and the good news is every Chiropractor I know will send you to the appropriate doctor if your problem needs to be checked by a different specialist.
Although it may not sound serious right now, the longer you take to correct the problem the more serious it gets. Because if your spine has been pushed out of place right now your vertebrae is currently pinching your nerves and the "spung like" stuff between your vertibrae. And over time that will wear out and cause some serious problems.
Another thing a lot of Chiropractors do as well, is there is a program out there called PCD, it's $30 a year I believe and this allows the chiropractor to charge you less for an appointment.
I recommend you start calling around, even if you can't pay them right away many are willing to work with you and set you on a small payment plan.
A first visit is usually no more than $150-200, and often times they are under $100. Once you become an established patient, visits will range $30-50. One thing I can say is you can't put a price on health, but I'm all about prevention and I know that by making a few phone calls you will find somebody to help you.
Just a word of caution, do not allow any other doctor work on your spine. Chiropractors go to college for the same amount of time as a regular MD, the only difference is after the first 4 years of med, they all go off into their specialty.
Good luck and be well!