i agree with you that this is not a sudden behavioral thing that is showing up. the DR doesn't know the answer and is making something up. please check out the book the GAP syndrome and check the article i'm giving a link for. i read this article in the Wise Traditions journal twice through in amazement and awe the first time i came across it. it really opened my eyes to the fact that soooo many of the health issues in our country are due to what we eat and western doctors don't see this connection. she even talks about how issues in the gut affect the UT and can cause bedwetting, painful urination, yeast infections around the groin (which causes people to grab themselves all the time). this may have answers for you
if you find this article interesting and want to learn more, check out the Westin Price Foundation on-line. also, a great cookbook for raising a healthy and wise family is Nourishing Traditions. finally, i suggest going to see a doctor who isn't western if you can. i take my son to a wonderful homeopathic DR in Berkeley/El Cerrito and i can give you her info if you like.
http://www.behealthy.org.uk/gaps.pdf
best of luck!
M.