T.M.
I have had many ear problems in the past.. It sounds like you had an inner ear infection to me.. When I get those it is really hard to hear; it sounds as if you are underwater. I am pretty sure it is a normal thing as it has happened to me... They generally give you Amoxicillanor something equivilant to that that you are capable of taking while being pregnant. I hope you ear feels better! :)