Ive been on depo for about 5 months not, had 2 shots. I had my daughter 6 months ago. I have recently started getting pink brown discharge like I had when I was pregnant. Is this normal?

I have had 2 miscarriages, 4 years apart and got pregnant straight after the 2nd miscarriage. Could this be sign of a miscarriage? Every time I was pregnant no pee sticks worked, I had to get hCg levels tested but at the moment im in a situation I cant get to a doctor. If anyone has had similar experience please let me know.