My pulse ox is measuring my o2 at 100. it has never been that high. is that good or bad? i'm not in supplemental o2.

Assuming good: The maximum the pulse ox can read as a saturation of blood (and not the heart rate) is 100%. Most blood is about 99% saturated, but given standard errors in measurement, 100% is not unexpected. If you can achieve this without supplemental oxygen and if you do not have lung disease (emphysema), then this is a good result, Keep up the good work!