Everything does seem to happen earlier the second time around, but I agree that 4 weeks is a bit early for round ligament pain. It IS very common for pain to occur early on, and even fairly severe pain can be normal. It is also good that you got it checked out and they basically didn't find anything wrong.
One thing that I see over and over again in pregnancy, is bowel problems. Just about everybody has trouble because the high progesterone levels of pregnancy cause the bowels to move more slowly. Left sided pain is always suspicious for bowel problems.
If you were my patient, I would encourage you to increase your fluids, take it easy on the exercise, and use Miralax or Colace if needed to help the bowels along.
I hope this helps!
Hi della03 it is normal to have diffrent side affects the second time....