One of the ones Philomena mentioned above (hiropraktor.com - Dr.Petar Dinic) - is probably the best and most educated chiropractor in Belgrade - I highly recommend him! He studied in the US as well - so they speak English there. However - not sure if he'll be able to see you right away - but you can call and ask. Not sure what kind of problem you have - but if it's serious - he's the guy to see. In case it is something mild - you can go to a physiotherapist. This guy does not do any of that jerk+crack+pull things.
Philomena O. replied:
Azmi ... here's a couple more but I have no idea if these places are any good or not OK. (Can you maybe get someone from your office to call and to take you?) - http://www.kiropraktikacentar.com/index.html - http://hiropraktor.com/