Does your neck also ache? .....especially on one side?

Do you have tinnitus (ringing or "whooshing") in either ear?

Does your eyesight get worse during your headaches?

Are you overweight?

Do you have any autoimmune diseases or symptoms? .....kidney issues?

It could be idiopathic intracranial hypertension (IIH), ie pseudotumor ceribri.

IIH is characterized by increased pressure of the cerebrospinal fluid in the brain. IIH is on the rise. Some cases are tied to position and posture, most notably curvature of the neck. So tight fitting clothing could conceivably cause you to change spinal position.