Heavier pressure one side of my uterus

Nina

I am 18 weeks and 2 days. Yesterday I felt pressure on the lower right side of my pelvis, and while it was mild pain it lasted in the same spot for about 3 hours. I don’t have any other symptoms like fever or bleeding, but I was concerned because the pain stayed in the same spot. Today, I feel the pressure on left side 🤷🏻‍♀️ is anybody else experiencing this? Is this normal?