12 weeks, "bump" on one side with pain??

[JoeyLin]

Hi, I'm 12 weeks exactly today.
No visible bump but when I feel different parts of my tummy - I can feel a bulge on the right side of my belly button that isn't there on the left side. Is that it? And is that normal?
Also yesterday I felt some pain from this bump - before I knew it was a bump. It did go away after a few hours and it started when I lifted something.
Just hoping some pains are normal at this stage?
I had a scan at 7 weeks and saw baby and heartbeat. I still have to wait a few days before my official scan

I've had no pain since week 6 - which is why I went for that early scan. I've had no blood or discharge.
So this is first pain I've felt. It was enough for me to want to go sit down, not forced to sit down. But I continued to do my daily jobs after an hour so I didn't focus on any twinges.

Could you be constipated? I've had that while pregnant & it can be v uncomfortable.