Can help you with the next course of action and treatment plan. Would like to discuss in details and provide apt solution. Kindly consult.

Kindly discuss for your concern

In these days of scorching heat keeping a room heater close to your head (or any part of your body)  can cause serious problems. It will delay normalisation of your body temperature. The more you delay cooling of your body, you may develop dehydration . You should have kept your fan on , let there be cross ventilation, drink plenty of water and other cool drinks, use cold sponging , and take Tablet Paracetamol. A heater is not indicated at all.

No need to worry.. Try to keep it little more distance from u.. Ur symptoms may not relevant to that

It shouldn't be a problem except some discomfort. If it helps with shivering you can use along with a blanket