Good advice from all - THANKS

I am sticking with it and am amazed at how my body is reacting. Not sure if it is some kind of muscle confusion everyone talks about but this new exercise (swimming) has brought me some new growth and definition all over.
I wish I could turn my brain off though. I find I get distracted and lose my form.
I think I am swimming too fast, any suggestions on slowing down? I don't rest as long between pool lengths but I still do and would love to keep going.
BTW: what's a lap? 1 length or 2?