My body temp is between 35.9c - 36c is this normal?? i feel fine other than a headache

Yes, it is normal: The normal body temperature is 37C but it can vary. I have patients who have had the same temperature as you in normal health. Sometimes, low temperature can be a sign of low thyroid hormone. This is not an emergency unless you have other symptoms. Consult your doctor if you need more information.

Low body temperature: 37 degrees C is considered normal body temperature. About 5 percent of people normally run lower than normal body temperatures, so this could be normal for you. Low body temperature may be related to illness, but is more likely related to the way the temperature is measured than to the health of the person. If you feel fine, there is probably no reason for concern.

Not a problem: If you don't feel sick, this is not a problem. The famous 37 degrees C. is an AVERAGE temperature of humans. Even people whose average temperature is 37 degrees have temperatures which fluctuate during the day.