I am 29 years old, during the cavity period I was finding it hard to breathe and also having dizzy spells. Fast forward to a few months later, I started noticing traces of blood in my saliva in the morning. Two days ago I noticed again and it was more visible, then last night I was drinking water and started feeling my nose block and was finding it hard to breathe again then I started feeling this metallic taste in my mouth, I spited and my saliva had blood in it again. I?m worried now.