Tenderness in lower abdomen

Rachel
OK so I'm 15 weeks, this isn't my 1st in fact it's baby # 4. I'm having a lot of what I think is round ligament pains, but for the last couple of days I've had tenderness on my left lower abdomen. Has anyone else had this? Should I be worried, or call my doc? I find that I'm very anxious this pregnancy, it has been completely different than any previous pregnancies. I have a drs appointment next week. I just freak out about everything this time around, I think it's because I spotted for the first couple weeks of this pregnancy.