Could also be an indication of dehydration, make sure you're getting enough fluids!
Yeah that's low enough to cause you some trouble. Tell your doc. They may not be able to do a whole lot but it depends on your health. Mine was 90/50 for several weeks which is pretty low but they didn't do anything. I started eating sausage amd bacon and drinking coffee, I think it might have helped a little bit. It came back up and stayed up by itself in 3rd trimester.