I am unsure if I am overdoing it or just being a sook. What kind of things did you still do around 32 weeks pregnant?

We have been understaffed and stupid busy lately at work. I am still only doing around 6 hour shifts, but lately I have been really sore after about 4 hours. I feel great in the morning, but then my legs ache and my belly starts to have all these weird pains. I had sharp pains today from belly button to right down low.
And yesterday I had to go to Kmart after work for a few things, grabbed a trolley and after about 30 minutes of gathering things I could barely walk. I was hunched over my trolley and walking so slow. I was already tired and a bit sore when I left work, but I had to get some things. It didn't help my closest store is in a major shopping centre. I needed to pee on the way out, but there weren't any close toilets and I just didn't have the energy and was too sore to keep walking and look or some. So I just got in the car and by the time I got home I was almost in tears. I can't do anything any more. No walking lots, no lifting, no bending over, can't even do grocery shopping cos I need help carrying all the bags in

Does this sound like the life of 32 weeks pregnant? Is it really this constricting? Am I overdoing it?