Tenderness since a week. Pulled muscle?

So since a week i have tenderness at the area marked. The area encircled in yellow, feels deep ache when touched, but with normal activity its not felt much, and the purple line is angle of mandible, when i keep my finger on it and open close mouth, when the muscle gets rubbed it feels sore. 4-5 weeks back in that side i had my upper wisdom tooth extracted, but after extraction i had taken antibiotics for 5 days. Now, since last week m seeing this. I had visited an ent last week, he prescribed amoxyclav and zerodol p, today the course is over but soreness is still there. Please help me, why is it happening.. i am also doing warm saline water fermentation over that area. Please help. Also note: when i click my ear, there's a kind of sharp pain under the middle of the purple line, is there any pinched nerve or something or pulled muscle?