Pain in side when lying down after symmastia repair?

I had symmastia repair 6 days ago (the symmastia was caused by breast enlargement I had in February). I only had the left breast operated on and the cleavage area sutred down from what I understand. Now I have a sharp pain in my ribs on my left side, whenever I try to lie flat. The only way I can describe it is like something is about to pop when I breathe in deeply. Any ideas on what this could be? I've had it for 3 days now and I'm struggling to sleep.

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