I missed my period.

My periods are very irregular but I usually get them the beginning of the month. I haven't had a period this month. I have been taking pregnancy test and they are all negative. I received 1 depo injection in March. Could it still be affecting my period even though it should be worn off by now? I am ttc but it's hard with all of this. After my miscarriage last year, my body hasn't be the same. And I am young (24) so doctors don't really take me seriously.

Here is how my cycle has been looking the last year or so. I bled from December to March after a miscarriage and I am 11 days late this month.