Talk to Gynecologist on Spotting Issue

assalamualaikum.. mjhy periods sahi s nhi hoty..start me spotting hoti hai kch blackish or brownish 2 to 3 days or uske bd bleeding hoti hai wo b KAm or pain b hota hai left side kbhi right side.. periods tym p hoty hen but bleeding nhi hoti just spotting or 1 day bleeding jb k pehle thk s hoty thy..kch test hon to btaden wo.i m un married..and Mera y b question hai k shadi k bd thyroxine. khati rahu to koi issue to nhi hoga mjhy thyroid issue b hai..thank u...