I had my left wisdom tooth extracted a month a go. Thought it would be easy, but it turned out that both roots were hooked into my jaw.Seemed to heal well, but then I developed this white hard sore at the inner gum line by the tooth extraction, which would be irritated after I ate. Now there is redness and little white pimple sores along with the white hard sore by the tooth extraction site and spreading out. It is irritated after eat. Should I contact my dentist and have it checked?