need answers!😩

Alecia

so here i am... 9 days late on my period.

no symptoms of a period coming and pregnancy tests have came back negative.

everyone says it’s because i had ONE depo injection on January 27th of 2018.

but it makes no sense. my period regulated in november of 2018 (by that i mean october, november and december it came on the same day at the same time) ....

me and my boyfriend are not TTC but also not preventing. i dont know what this is someone give me an answer 😩😩😩😩