I've followed this thread for the reasons everyone else has- stress has played a huge part over the years, from missing them to having way too many. There's been no other explanation- plus, before the PTSD and the life events which caused it I WAS a 28-day, like clockwork person. At 53, with things friggin in an uproar in the system it's a dam nightmare, although gyn states 2 week long periods are 'normal'- ha! Then another in 2 weeks. OK. I'm only answering this for one thing because the difference pre-traumas and post was ridiculous. I'm not a medical person but geesh- how could there be a doubt? The other reason is that neurotherapy sounds extremely interesting, am wondering if it's something which would still be helpful through the whole menopause thing.