Thank you for posting your query.
You are probably correct. The most likely diagnosis in your case is migraine
Oestrogen is known to aggravate migraine.
Aura is a transient symptom lasting for few minutes, and is followed by severe headache
In some cases, only aura is present, and headache does not occur.
The effects of oestrogen should disappear after a few days of stopping it.
Dr Sudhir Kumar MD (Medicine) DM (Neurology)