Hi!
If you were my patient, I would advise you to repeat the pregnancy test in a week. It may still be negative and if so, I would probably have a "wait and see" attitude--as it might just be irregular bleeding caused by the recent miscarriage. On the other hand, it iust might be positive.
Good Luck!
Dr B
More likely your pregnant I was one day late and got a bfp
Relax. Stress can create a goofy period. It also can't help if you are.