Unilateral earache. Cm. please suggest.

I am 28 yrs female, with a history of migraine since 10 yrs. Earlier I had taken prophylaxis bt now I am just taking pcm sos , usually get 3 to 4 attacks in a month. On severe days, I need to take inj diclofenac. Since 4 days I am having unilateral left earache, mostly in front of tragus and surrounding external ear. There is heaviness in ear. Relieves on taking pcm but it is getting increased locally. Now I m having pain in temporal areas n mastoid area, left jaw n tooth. Sometimes it leads to whole headache. I am confused if it's because of migraine or cold I had a history of cold n cough last week. Ent doc told me that it is nt related to ear. Is it neuralgia. Or because of cold. Pls suggest. Right now I hv been told to take gabapen n p.cm. Please suggest.