Stretching pains?

Bailey

Hi y’all, so im currently 19 weeks and 5 days pregnant for the past couple of days it feels my right lower abdomen has been sore and has been aching i felt it when I get out of bed or when I change my pants I’ll bring my knee up and I’ll feel a certain type of pain it’ll come and go... went to the ER 2 days ago and did an ultrasound and said everything looked great with the baby but the pain hasn’t really gone away I try to get advice from other moms and they just tell me it’s ligament pain or stretching but would stretching last this long and feel like a stabbing pain or a stitch pain? Im a first time mom so I don’t really know what’s normal and what’s not anything will help thanks!