Do i have glandular fever or not?

i'm not sure if i have glandular fever or not. my throat is pretty sore and i keep coughing all the time. my nose is blocked and i have a sore head. i feel pretty tired. i have had quite a lot of sore throats this year. or maybe i actually have tonsillitis. my throat does feel a little bit swollen. i can't be off school because this is a important year for me. even though this is our last few days at school. or should i take some time off school? note: i only put this question in this section so people would answer quicker, thanks! :D