Job restriction

I'm an heavy equipment operator and I'm.6 months pregnant. Is there anyone else that was in this type of job and this far along pregnant that found it extremely difficult to do.their work. My Dr has already told me I should operate certain types of equipment or work night shifts. Was there anything your work got you do to that you found easier on your body? my work won't get me to do anything, I literally sit and read books for 12 hrs a day. Although I appreciate that they will take it easy on me I wish there was something I could do instead of sitting around when other ppl are working.