I'm 32wks 3d

I walk up these small hills to get to the train station and then I walk back and forth at work. I just feel like I'm wasting my time there because of the lack of hours and business and I'm just putting more strain on my body. Because I walk so much I don't look like or walk like your average 8m pregnant woman. But if I stay home I become so bored and annoyed lol. Ugh when should I stop working? I was thinking at 34 weeks because with my son I gave birth st 37wks and I don't want to break my water while trying to seat someone at a table lol. 

Or should I just stop working now?