Deciding when to leave work???

Megan

I'm 30 weeks pregnant, I have sciatica, which is painful and making it harder for me to get around. I'm tired all the time, no matter how much sleep I get, and my belly has really grown to the point it's also making it harder to get around, on top of my feet hurting pretty frequently. I work 32 hours on average most weeks, and my job requires me to be on my feet all day and I'm constantly moving around for the most part with the duties my job entails. My work is really good about letting me sit down and take breaks as much as I need to but at the same time I can only take so many breaks throughout the day, especially when I'm working alone, which is the case most of the time. So anyway... I really thought I wouldn't be feeling this exhausted this soon but I am so I'm just confused on what to do. If it's time to just cut back on my hours at work or if I should be thinking about going on maternity leave soon??? Please help!!!