[carbocation]

This is extraordinarily dangerous advice.

The description given above is likely a myocardial infarction or an aortic dissection.

If you are having chest pain, you should minimize myocardial demand. Sit down. Call emergency services.

Do not exert yourself by walking. That is a recipe for sudden cardiac death.

[trappist]

Completely agree but an expectation that the nearest colleague should know this is unrealistic.

[eproxus]

Is it though? If it is your team lead who apparently has the managerial power to deny you a medic, they certainly should also be required to be competent enough to make that decision.

Anything else is just an accident waiting to happen (and in this case, did happen).