It could be gas. I literally just experienced it a couple of days back and I’m in my 2nd trimester. To be honest I just kept farting the next day and it got better. But if this worries you too much, go see your gynae and confirm that everything is okay.
I have it. Seem like some nerve aching (somewhere under the rib cage) I have it during my 2nd trimester..
See your gynae if the pain is worrying you. 1st trimester needs to take more caution