Hello! Girls, I need advice ?? 21 weeks pregnant, first pregnancy...…

Hello! Girls, I need advice ?? 21 weeks pregnant, first pregnancy... I have chronic pyelonephritis, in this period I managed to lie down twice in the hospital, often take sick leave... The thing is that my work is "stationary", all day on my feet. Considering vacation, until maternity leave I still have a month with pennies. Management doesn't change to a sitting position, citing that there are no places. I don't know how much longer to endure or give up everything.