Confused

I lost my angel at 6 weeks in January. I got the depo shot in February but never went back to get another. I just started this cycle taking ovulation test. Day before yesterday I got a line not dark but got one. Then yesterday it was bright blue. Today I took one to see if it would get any darker and it was almost invisible there was hardly anything there!!! What does this mean? Am I even ovulating or am I just wasting my time!! I'm about to give up!!!