Pain in Left Side.

Paige • 25. Baby #1 (LK) is almost 3 years old.
I'm 6 weeks and 4 days, had my first ultrasound yesterday, healthy baby from what the RN could see, heartbeat at 136. I have yet to see my real OB though. 
I am experiencing a pain in my left side under my ribs when I yawn or take a deep breath. It doesn't happen any other time. I googled some and came up with trapped wind and a product that I can't find called Rennie. 
I have no bleeding or other symptoms. Anyone else experiencing this pain? Thoughts and advice? Am I just being a worry wort?