Working too hard

I'm almost 7 months pregnant. I gave A months notice that I was leaving my job and not coming back. Since I put in my notice they have been packing in every patient they can. I didn't work this hard before I got pregnant. Now that I'm a week from leaving they are completely filling up the schedule every day getting as many people in there as they can before I leave. I told my boss I can't work this hard anymore but he continues to stack people in. I'm to the point where I just don't want to show up tomorrow. I don't get any breaks and I don't even get a lunch break. Is it just me or is this completely wrong of my boss?