Re: any nurses or doctors? UPDATE!
We dealt with chronic constipation with DD when she was 1-2. I don't really remember when it stopped, but she doesn't have any problems now at 4 so I guess she just grew out of it. And when my little brother was a baby, he had a similar problem, but the cause turned out to be an over-tight anal sphincter. Which had to be manually stretched.
Good luck mama, hopefully the doc can get to the root of it!