Hello and thank you for asking. Sorry you are having so much pain but this is not unusual with adult molar extractions.
Extracting a molar can cause some local trauma just from the procedure. The lower jaw has denser bone than the maxilla for one thing (and in adults it is less malleable). Bone has to be pried away from the tooth so to speak, to allow the root to be extracted. Sometimes even cutting some of the bone away is necessary. So, the procedure alone can cause enough trauma to cause pain for a number of days.
Secondly. Given the fact that you needed 10 needles (which seems unusual), a nerve may have been nicked or blood vessel nicked that caused a leak (hemotoma or bruise) during an injection that is causing residual pain. Nerve pain can also be caused by swelling which may compress an area.
All of the above usually resolve in a few days but can take longer.
If it is due to any of the things I mentioned you can try the following:
1. Rinse with warm salt water (2 tsp salt in 6 oz warm water) this will reduce bacteria and soothe the area.
2. If you are still swollen, use an ice pack ( this is best done immediately but may still provide some relief).
3. Drinking warm tea also helps soothe.
If it is from the needle, the discomfort will last somewhat longer, even a few weeks, but it should ease along the way.
Try alternating Advil with motrin to reduce swelling and help with the pain.
I hope this helps. Please ask more if I can assist you further.