You seem to have blown too forcefully which has caused the caused the Eustachian tube dysfunction
. The fluid has collected because the normal drainage
of middle ear through this tube is blocked. The vertigo part can be because of ET dysfunction or can be because of infection travelling to inner ear
. You should take a course of antibiotics along with xylometazoline
nasal drops, oral decongestants and lalabrynthine sedatives. Do take rest. Do not drive. Take care.