For the last few months I've been late on my period. I was suppose to start June 28th 2015, it is now 5 days later and I still haven't started. According to my husband my OBGYN used claps to tie my tubes 8 months ago during my C-section. My doctor had shown my husband what he was doing so that my husband knew what was going on. I now fear I may be pregnant. I have been having back pain the past week but don't think that ties in with missing my period. What are the chances of becoming pregnant after having your tubes tied 8 months ago?