When did you miscarry after you started spotting?

Im 6weeks pregnant. Got my positive digital on dec 28. Since tuesday (jan 7) ive been having really light spotting. Usually its brown, sometimes its pink or red. Im having mild cramps. Theyre not as bad as period cramps but still uncomfortable. I called my dr & they wont do anything unless im bleeding through 2 pads an hour. This is my 3rd pregnancy. I had some spotting with my second that ended up as a SCH that healed on its own. But the spotting did not last this long. Im honestly miserable with worry. Im afraid to exercise, to lift my toddler, to wipe every time i pee :( im thinking of calling my dr again & requesting a progesterone & hcg blood draw, just to see. Idk if theyll do it though. So, if you feel comfortable talking about it, how long did you spot/bleed before you had a miscarriage?