stopped depo.. help.

ADVICE NEEDED PLEASE!!! Hey everyone. I got the depo njection at beginning of the year as a single mom I forgot all about going and getting it redone so I decided against. I had an ectopic pregnancy 2 year ago today. I'm almost a month over due for my depo injection... curiosity is a killer and a feeling is all it takes to start POAS... I took a one step pregnancy test and a faint colourd line appeared in the test area that faint a image is hard to get but it is there and it is red in colour. that was on the 16th i did a Adsa own test and it looks negative. I will try get an image of it if needs be.. please help me...