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Unless you're not reading the test right, faint positives usually mean that you're pregnant. If so, then it looks like a miscarriage is likely. With a good pregnancy, faint positives should turn into strong positives in a day or so.
So I suspect that the bleeding is the first stage of a miscarriage. Time will tell. If you wish to be sure, your doctor could do a blood test for hcg. If it shows that you're pregnant but with a low level of hcg, that generally means a miscarriage. I'm sorry.
If your tests are getting darker, that's positive for a possible normal pregnancy. However, the bleeding is still somewhat worrisome.
If you're getting a positive test on a digital test, that would be good.