Sleep now

Here is my rant- everywhere so go I have been getting the advice to "sleep now". This annoys me Bc 1. I can't stock pile sleep (why not suggest stock the freezer or buy diapers or something?) and 2. I'm not sleeping! At 9 months with a normal sized baby, I'm up every 2 or more hours to use the bathroom. I'm physically uncomfortable and while I am excited, I can't force what won't happen. Worse, this advice comes from other moms that I assume also had a pregnancy and understand that the baby's favorite moving time is when I'm still- trying to sleep. Anyone else feeling frustrated?