The other night, when I was doing my upside down exercise, Jackson got right up on the couch to do it with me.
From the same website, I thought this was an interesting ~ and sad and sweet~ theory:
That is that babies often turn to the breech position in order to come up to comfort the mom. Because it sounds like you are so anxious (even though the basis of your anxiety is the position) I would consider this to be a strong possibility. So, try spending some time talking to the baby. Tell it that you would feel much better if it would put it's head down. You appreciate the fact that your baby is trying to comfort you but the best thing would be for it to get in the most positive position for the birth.