I keep coughing/loosing blood! Any idea? TMI

I’m not here for anyone to diagnose me I know it should be a doctor I just wondered if anyone has had anything similar or could think of anything to cause it. I have been to the doctors I’ve been going for about a year and they say everything’s normal and can’t figure out what it is. I basically cough blood a lot and when I’m sick ect but recently for about 5 days I just keep discharging blood from my mouth. The other day I acctually had a blood clot come up from my throat and I’ve woke up with bloody in my mouth ect but just now I was lay down watching my phone and I sat up as could feel something/taste something strange. And suddenly this just came out of my mouth, checked all of the inside of my mouth and there was no cuts or couldn’t find any blood coming from anywhere. This is what came out. I just don’t understand what it is