Anyone experience a late leak?

Hey Everyone, 

I'm wondering if there are any of you out there who discovered a leak weeks after your surgery? I am 9 weeks post op and for the past few weeks, I have had some pain on my left side, in my back behind my ribcage. It felt like muscular pain at first and there is a pretty big knot in there.  What worries me is that I am still experiencing this pain. Could this be a sign of a leak? I have no other symptoms besides the back pain. I was a self pay patient and had surgery in MX, so my resources are rather limited. I'm not sure who I would even go see to get this checked out. Thoughts from any of you that have experienced this? 

Thanks!