Should I be worried??

Genesis

I’m 18 weeks & 3 days and I been feeling a lot of pressure on my lower belly on and off. But sometimes it’s really strong. I feel like I have to go to the bathroom and I got but I don’t pee and if I do it’s a little. But the pressure is just weird idk if I should be worried or what I should do? Any other moms to be or moms experienced this before? I don’t remember this with my son at all!