I had a operation yesterday on my ears & had a general anaesthetic, now i have a sore throat and have coughed a little blood up, is it normal ?

Yes: The breathing tube placement may have caused a little irritation in your throat. This is normal and should resolve within 24 hours. If it does not or gets worse or you develop a fever call your surgeon and also speak with the anesthesiologist.

Yes: It should be all gone by now - most likely it was from intubation, inserting breathing tube through the mouth for the time of surgery.