My temp is 96.3, isnt that kind of low?

Not necessarily: Standard or average temperature is 98.7°. People can be slightly warmer or slightly lower. The temperature can also vary based on the thermometer used. If your child is acting sick, then you should see your family practice physician.

Yes!: You need your thyroid checked: a free T3 (liothyronine) & 4, atsh, and thyroid antibodies are in order.

Not abnormally so: Most people are not exactly 98.6 . Many factor effect body temperature including time or day , the way it was measure oral, usually lower, vs rectal. As we age our body temp varies. Not to worry even it 96.3 is your temp that is not unhealthy.