Help 32wks

I'm still working long days and I'm on my feet from like 6-12hrs 5 times a week. I'm really struggling honestly. My feet and legs hurt so does my back. Also, I have a lot of pressure in my pelvic area. I feel like when I try to explain to them they may feel like I'm faking it to get out of work. But yesterday i nearly passed out twice in work don't know why. I had eaten plenty and been drinking plenty of water/orange juice. Don't understand why it keeps happening. My baby is active like constantly moving and flipping around.

Any advice will be grateful I see my midwife on Friday also