Is it normal to be constantly be exhausted while pregnant?

I’m curious if anyone here has experienced a SEVERE lack of energy during their pregnancy?? I’m rounding out of my second trimester, and I have a hard time finding energy just even to get water, make food, even use the bathroom when I need to! Ugh! It’s awful! My OB says it’s normal and gave me a few things to watch out for, but I’m curious if any other moms experienced this during their pregnancies. I am on my 5th pregnancy and don’t remember any other pregnancy being this bad. I’m so over tired and feel exhausted constantly.