Lifting is the worst for many because many who lift tense their neck muscles as they strain to lift. That exacerbates headaches. Running has a lot of impact trauma from each foot plant.

Have you tried low impact exercise, spinning, rowing, strider, elipticals, ?

Stress can be studying, conversations and discussions, loud music, etc.

The Buffalo protocol limits exercise to below the symptom threshold with slow increases in effort and heart rate every few weeks.

The simple concept is, If an activity causes symptoms, reduce the intensity of that activity to avoid symptoms.