What does the "no period" test include? $575 seems like a lot of $. Are your periods regular normally? Could you call your GP or gyn and ask them to check PIO level and if you have not ovulated, ask he/she to prescribe provera? If they code the tests as irregular menstruation your insurance might cover it. When doing a DE cycle they manipulate your cycle with hormones so it really does not matter what your body does on its own. Good luck. Maybe just working on a plan to make her show up will make her arrive.