if it keeps recurring (and you have had a history of glandular fever in the past) it could be a sign of bacterial tonsilitis (the little bumps and pockets from glandular fever are a fave hiding place for the bacteria!). basically i was told that if you get it more than 3 times a year then to get it checked out...in my case it was every 2-3 weeks so a no brainer lol.

hope that you get better soon xx