I've been having a really sharp pain on my left side of my stomach for around 4 hours. At first, baby was on my left side so I thought maybe it was just how we was positioned so I tried moving him by drinking lots of water & massaging my tummy but that didn't work so I laid down for around an hour & the pain went away for a little but then came back. I got up & walked around the pain was still there but now it's just coming & going. Baby is on the right side now so I don't know what could be possibly hurting me there now. Should I be concerned?