Weird period months after LLETZ

Hi. I'm just looking for some advice. I had LLETZ on an extensive area of my cervix and up into uterus four months ago and since then my periods have been odd. For about a week before my period is due I get very light spotting but no real period ever appears. Ive been to the doctors who thought she could feel some resistance when passing a swab through. I went back to my gynae and he just cauterised it. However, I am spotting again and alas no actual period! I'm stressing that my cervix has  narrowed and am concerned that blood isn't coming out? I was just wondering if anyone else has experienced similar?