Do I have a summer cold or allergies?

When i woke up this morning, I felt really congested. All throughout the day today I've had postnasal drip, sneezing, a stuffy nose, runny nose, headache, scratchy/itchy throat, and i'm really cold and tired now. This came on so suddenly. Does it sound like allergies or a summer cold? How do I get over this in 3 days? I move to college in three days and have sorority stuff to do!