I had my r/upper wisdom tooth removed on 2/16. It was not impacted or below the gums. I to have a hole in the back, half of it is healed the other half is still "open" and red, somewhat sensitive. I keep rinsing it with warm water and salt. I had stiches, but cut them out myself, they were not dissolvable, but they irratated the area so bad and I could not afford to go back to the dentist (i know...thats bad)! However, I think it's healing, just slowly. Good Luck
it can take a while. it would be a good idead to see the dentist who did the extraction (or an indepepndant oral surgeon) and have the extraction site evaluated.
It doesn't sound like a dry socket because you would have much more discomfort. The socket will fill in and keep it as clean as possible and have your dentist look at it every so often.It is not unusual for the socket to be sore in certain areas.