Symptoms of mono. How long can it last in adults? I have sore throat. Fatigue. Loss appitite. Headache. Weakness. Had temp 100.2.

Could be. Mono or some other virus, or even a bacteria. See a doc or other provider. You may need some labs. Or, if the symptoms have only been there a couple days, maybe you just need to rest and wait and you will feel better soon.