Tired

I am just so tired. I've been sick for a month now. Yes, Monday made 4 weeks to the day that I have been unwell. I've had the same symptoms and course of illness as one of my co-workers (everyone's been sick-but we've had the exact same thing). Two days ago he tells me that he's starting to get back the same symptoms as when it all started. He took his temp and it was fine, but later in the shift he had a fever and went home sick. I took my temp and it was fine, but before I left work I took it again and I had a low grade fever. Aughhhhhh!!! He called in sick yesterday, but I had no fever and came in. But, periodically the dizziness is returning. When will I be well again??????