So 2 weeks ago I had an almost month late period. Ive been extremely ill with a virus for over a week. Out of nowhere I get dark brown spotting, almost thick like. Maybe 1 time wiped and it was enough light red to use a light tampon, all that had was the dark brown sticky stuff. Only lasted 2 days and now its gone. I'm not due for my period for another 2 weeks and so confused. I am 37 years old and have 2 children who are older and never have had anything like this. When would a test show if I'm pregnant? Could it be implantation bleeeing?