First thing if it is a surgical extraction then do not doubt your doctor as it is documented that in surgical extractions pain may increase or decrease...
Yes swelling is normal as wound is yet healing...
as it needs more blood supply to recover and regenerate new tissues again.. it's OK.
During surgery more the use of Rotary instruments more the swelling...
So in simple words swelling will rise for first 3 days then it will be der for next 1 to 2 days and then it will gradually reduce over a weeks time...
About pain management taking painkillers may help but only solution is time now...
Next Steps
wait for a week, things will improve drastically
Health Tips
take care of wound, keep it clean and avoid tampering it with tongue or fingures..
lastly have some patience.
we understand it is difficult time for you as a patient but things are not not easy as a practioner too.