It sounds like you have an infection. Has the doctor given you a prescription for antibiotics?
It will smell because it is bad and infected.
If the doctor has not given you an antibiotic, do remind the doctor whether you should be given a prescription to stop the infection spreading further, even though it has been lanced. There will be a root plug and this needs to be removed completely. If the root plug is not completely removed, it will fester and flare up again.
It is awkward for you with it being in the area where it is. Had this boil been where you got easy access to it, you could have applied a magnesium paste drawing ointment. This can only be applied to unbroken skin.
When you see the doctor tomorrow and get some more rubbish out, ask the doctor about washing the area in warm water with a an anti microbial solution added to the water. She may prescribe that for you.
Wishing you a speedy recovery.