While most people get constipated, any change in bowl movements is normal and not at all a cause for concern.
4 or 5 is a lot! Sounds annoying! lol But if you're eating more fruits and veggies because you're pregnant that can add to it, and if you're taking prenatals, many of them have stool softeners in them because many ladies get constipated. (i'm not by any means saying you should stop doing those things, I'm just saying it can be part of why)
I would of course still tell your doctor just so they know what's going on with you.
and be SUPER EXTRA sure to be drinking LOTS AND LOTS of water.
Side note; if it does turn to diarrhea for more than a couple days, that is more of a reason to contact the doctor. It's not horrible or anything, but it's something they say you should be sure to reach out about.