I'm 13 weeks today and for the last few days I've been getting a pain around my sides/rib cage. I did lift a few heavy bags a day or so before (around 15kg), so I'm not sure if that's what's causing it. I was told lifting is fine if you did it pre-pregnancy, but maybe I've over done it. Obviously I won't be doing any more lifting to be on the safe side, but it's definitely a feeling of aching muscles. A bit like when you've done a workout which makes you sore for days after. Is this normal, or should I call the doctor?