Welcome to HCM. Thanks for posting your query. Sore throat
and difficulty in swallowing seems to be infection of the oral passage. Dont get worried we are here to help you. It is simple pharyngitis
. Salt water gargling- add a pinch of salt in luke warm water and do the gargling in the morning and evening and before sleep. This will help you in soothing of your throat. Avoid cool water, soft drinks and ice creams for a few days. Take more luke warm water for drinking. If the pain is too severe start with antibiotics and antihistamines and pain killers. Please dont attempt to clear the throat too many times which was the reason for your blood streaks.
Dont get worried you will be alright. Hope this is helpful to you.