blood in your saliva could also be an indicator of a dental problem or a bleeding disorder. but i think infection or an obstruction is more likely
its probaly a reoccuring infection, the pain in your mouth and throat can also be accociated with the lymphnodes that are effected by your ear.... you might want to ask a dr if they though an mir might be apropriate to rule out any kind of growth or obstruction of eustachian tube... an infection in your ear can also spread by direct contact to your throat and through blood flow to other areas.. it might be a severe bactiria like staph or mrsa which are hard to get rid of and require mutiple treatments and in such an inclosed space it would be easy for it to excalate to even worse symptoms... if you experience a fever especially if its high take it very seriously and see a dr asap
I'm not sure what you have but I do know you need to go see some one who deals with ears, like a specialist. They might be able to help you. Good Luck.