Ow! Was playing tennis this afternoon and was taking it really easy and not running much (am almost 20 weeks pregnant)... and then stupidly went for a tricky backhand and twisted and reached to get it. Lower left of my abdomen REALLY hurt!! Is this just round ligament pain from overstretching?? It's hard to do any damage to the baby just from a bit of tennis, right?? Bit worried now and feel kind of guilty...