Lethargy, nosebleeds and migraines?

Recently I have been experiencing extreme lethargy to the point it is affecting my schoolwork. I come home get some homework done and go to bed, sometimes I lose my appetite as well when I get really tired. I have also been experiencing these nosebleeds that last for 15-20 minutes and are quite messy, and they seem to happen nearly everyday! In the past two days I have also experienced a migraine. I'm only 17 and have experienced migraines my whole life but it seems they are becoming more frequent. I am going to the doctor this weekend but I wanted to know if these are symptoms of anything or just unrelated events. Any information is helpful thanks.