I've been feeling really tired for weeks and have been sleeping like 12 hours or more sometimes. I thought it might just be a winter bug going around, but today I got really sick and cant even keep water down. Then this dry cough showed up and I've noticed dark hairs, some long and some short, with different thicknesses. I've been collecting them in a tissue because it's freaking me out and I'm scared this could be something serious. What do you think is going on?