Hi Jill72,
Sorry I can't be of use of the water birth front; as I'm a wose and want as much pain relief as I can possibly get.
But, I also have a BMI of 36 and my midwife said that because my BMI was over 30 I was classed as "at Risk", I said basically I'm fat!! and she just said Yes
. Great!! tell me something I didn't know!!
.
Sometimes I don't think it's a good thing to tell pregnant women that there fat; we have enough to worry about. It's just a good job I didn't take it to heart and decide to diet, as some women might. I have just eaten healthy(ish) and when I wanted to eat, which has been little but often rather than 3 meals a day.
I was then treated like I needed to be wrapped in cotton wool; having to have extra appointments, shared consultant / midwife care; glucose tests, eating healthy etc, etc, etc. It turns out, my glucose test, blood pressure, urine samples, etc, etc have been all perfect, but because "I'm at risk", I can't use my local Birth Centre in Huddersfield, I MUST go to Calderdale "just in case". Just in case of what exactly!! 
Calm
xx