Have I had a miscarriage?

I had a baby 3 months ago, i was late on my period and had very strong stomach pains and lower back pain! After a little bit I got discharge and blood, and later on got very strong pains and blood and little clots, I took a pregnancy test and both had very very faint positives not evaps, and i have nearly been on my period for a week only usually have one for 4 days, and no sign of it slowing down! It also was stop starting at the beginning

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