lake Can you get a dry socket a month after extraction?

My lower right wisdom tooth was impacted and removed. Early in the recover process I had a partial drysocket and infection. It was packed and I continued my antibiotics and washed with a mild dental antiseptic given by dent. Last week it suddenly started hurting again. Not as bad as the socket + infection but it's pulsing pain nonetheless. The focus of the pain feels like the closest molar and a portion of the extraction area is sore. I went to the dentist today and saw the hygenist who simply said it had food in it. I wash it out regularly and had started to swish it out about two weeks ago. Is it another dry socket?there