Cramps/pressure at 6 weeks

I am 6 weeks and every so often (not all day but throughout day) I get this pressure on my stomach like cramps but doesn’t feel like “period cramps” sometimes feels like I have to go number 2 but I don’t.

Is this normal? Is it my body just altering (this would be first child) I am super nervous about something going wrong after trying for so long.

Any advice would be a huge help - just FYI the cramps/ pressure isn’t painful just very uncomfortable at times then will disappear and then come back. I have not bleeding or spotting though.