Sounds just like what I was going threw It was strep Throat. Good luck
Perhaps you have scrapped the inside lining... You may want to call a local hospital and tell them and see what they can tell you is wrong
Ulcers could cause this as well. But if you were scoped then probably not. Maybe the mix of stomach acids are making it taste of blood. Acid reflux or something of the sort.
You might just have riped a little bit of skin in your throat when you coughed it doesn't hurt you really
It sounds like a serious strep throat which can only get worse without antibiotics it can spread to other parts of the body and is contagious to others the blood could be coming from the raw throat. It also could be coming from your lungs which could be pneumonia both are curable so get to a Doctor don't put it off!..Genaveve