This is my story. Before I had my daugter back in 2007 I had normal regular periods but after my daughter was born I got the depo shot for birth control which I only got one time, which messed up my cycles and made them very irregular. Then in 2010 I got pregnant again but I ended up having a miscarriage at 5 weeks pregnant, but after that my periods were still irregular then in 2011 I got pregnant with my son, which my son was born in November 2011, after I had him and was still in the hospital I had a tubal ligation and after that I was having periods every month until April 2012, April 2012 was the first month I didn't get a cycle, could this be because I was having irregular periods before?