Hello sir... Based on the clinical picture the caries in the wisdom teeth looks deeper and also the wisdom teeth is partially erupted... and because of the infected teeth you may have lymph node enlargement.... first and foremost x-ray has to be taken to check for extent of caries and position of your teeth.. Treat the wisdom teeth as soon as possible...treatment includes removal of wisdom teeth followed by analgesics and antibiotics...

The wisdom tooth is infected and needs to be treated asap..Visit a dentist to examine the tooth with x ray as half tooth is covered with a flap and food lodgement in that area is aggravating the pain and sensitivity alongwith swelling in nodes present aside..X ray will lead to final treatment plan whether the tooth can be saved or is there need to extract it..

You are advised to meet a dentist as soon as possible and get a proper diagnosis for your symptoms done with digital radiography. All your symptoms point to infected left wisdom tooth. Get it confirmed and treated.