19 weeks +4 with twins and have had a sharp pain in my side the last 2 days! I called the dr and he said not to worry if there is no blood, but what could it be!?! He said it could be constipation, but I took 3 bowl movement this AM after drinking coffee. He said positioning of babies, but it's DIRECTLY on my side, are they already on the side at 19 weeks?!? Stretching?!?  Does round ligament pain last for days? If I lay on the couch I don't feel it, but when I'm up walking around it feels like a bad side ache! Any advice out there?!?