help!

Oh, how I can relate!!  I recently went on leave from my nuclear security job where we would be posted for hours at a time without relief.  I also wore a 30 lb. utility belt for 12 hours a day.  Sometimes I thought I was going to burst.  Once finally relieved, it would hurt to walk to the bathroom.  I decided to leave when my bladder began leaking.  I would loose control due to having to hold it all the time.  I too am at 28 wks, and now have much less pain and incontenance issues.  My advice is to avoid constant "holding" as it really seems to weaken the bladder.  If you find you have weakness, practice kegels (10 sets of 10) while in traffic or watching tv.  It has really helped me.