Warning:Do not use some oil!
Material: Gum,hard pillow, a shower, hard food(sallory is the best) and yourself.
Tips:
Try chewing gum alot and chew it on the side that your ear in blocked, also try sleeping on that same side.
Try to take a shower turning your head the same way your ear is blocked
Try to move your jaw a bit left and right and see whats the difrence
Try to eat hard food like: Crackers,Pretzels,chips,sallery(very good)...
what if it doesnt work:
If nothing of those works, wait a bit(couple of hours or til when you dont have the flu anymore), and start all of those tips again.
what if it stills doesnt work:
If nothing happends and its been a long time you tried, go and see a doctor/specialist.
Hope it works for you but it did well for me!