What Causes Irregular Menstruation And Spotting After Using Mesh?

hi Doc i m a 43 yr old female. this is my history . 2 c sections, one miscarriage d&c, abdominoplasty in 2010 with a mesh fitted. i have had no complications so far. except since sept been spotting and period cycles beena bit irregular.i have been exercsing and doing weights since a year .eat healthy . i smoke regularly that s my only vice. my periods last bout 5-6 days . i got my period on saturday 15th . i consulted a gynac who recommended cbc, t3, t4 , fsh, prolacin ,lh , dheas, thyroid . all test results are in normal range .the report shows i m in follicular phase. i just want to know if m normal. what cud be causing the bleeding .