Have you been vomiting? If so, your throat could be irritated. I have a deviated septum and when I sleep I breath through my mouth so my throat often gets dry. That could be a possibility as well. If it turns dark red and increases, see a doc immediately.
No I haven't. I need to make an appointment though. The first time it happened I thought it was my gums but then it felt like it came from my throat or something
Have you been to the dentist? It could be your gums bleeding.