Like Tashybabe, I've never temped vaginally because it's really not something I want to do first thing in the morning.

If you're not comfortable doing it, don't do it.

Consistency is the key with temping. I also used to use the same side of mouth, same position every morning. Some months, my temps were perfect... spiked at the right time to show O, dipped with the arrival of AF. Other months, I would have no idea how to pinpoint O as they were so erratic.

Have you had any other tests done to check for PCOS?