with depo injection some women can experience menstrual irregularities like delayed periods or even absent periods for some months, breast tenderness, bloating
abdomen etc could also be its side effects,
but if you are already pregnant before using depo then the bleeding on June 13th could be implantation
bleeding or as depo is having around 1% of failure rate you can also become pregnant being on depo though that is rare,
so you better go for blood test
to rule out the possibility.