Eustachian tube blocked

[Misslgl88]

Hi all following on from my post before

I've just been to my doctor about my ears as for the past 2-3 weeks I've have a fullness in my ears, slight ringing in my ears (I know it's there but not bad enough to stop my day to day life), and dizziness. The doctor had a look In my ear and said that I have slight blockage in my Eustachian tube. He says they are commonly caused by colds, allergies but I haven't had a cold just before this started and the only allergy I have it urticaria so I take piriton one a day every day. Is it possible I may have had a slight cold and not realised? I only had a baby 7 months ago maybe I've been run down since then or my ears haven't been right since labour? I just wondered if anyone else had had this and it didn't have an obvious cause? Did it resolve on it's own and how long did it take?