Pregnant after depo 💓

Here’s my story 💓 I had my first baby September 16” and breast fed up until June 2017 then got my FIRST period July 2017. I got on depo Vera for bad cramps July 2017 I was suppose to go back to get my shot October 2017 but never did .... my period came back November 2017 . I started using ovulation test after my period ended ( Feb 12 2018 - feb 15 2018) they all said NO LH SURGE. !!!! BUT TODAY MARCH 7th I got my big FAT POSITIVE !!!