When will stich dissolve after WT work?

I have removed my upper right wisdom tooth in July.No stiches done and it was healing normally. I see some hard bump on the gum of the extraction site in August. Went back to OMFS and he said it will absorb on its own in 2 weeks. I waited till last week and it doesn't. It was painful. I went back and he said it's bone . Put me another few anesthesia shots and shaved it so aggressively. He put some stiches on that and said it will dissolve on own sooner. No follow up for this. It's been a week and I still have soreness and pain on that area. If I run through my tongue, I feel some thread or stitches between second upper molar and the wisdom tooth removal area. It gives some sharp pinch like pain sometimes. Sometimes while eating and sometimes without any trigger. I feel like something pinching on that extraction area. Is it normal while stitches still present there. How long does it take to dissolve? Is this sharp pinch like feel for a second is normal?It comes for 4 to 5 times in a day