Is it normal for your back to hurt this bad while pregnant

It’s to the point where by the end of the day I am limping. It’s only my left side hip low back area and so sharp and painful. Idk what to do. I’m a stay at home mom and have a toddler so I try to stay off my feet as much as I can but that’s not always possible. It’s seriously the most painful thing I’ve ever had to deal with. I can’t turn in bed I can barely get myself up and like I said I am literally limping around so I don’t put pressure on my left leg and make it worse. I’m 38+4 btw. Also they told me at my 20 week appt that I have anterior placenta