Ay, that's stressful, sis! Brown spotting with a delayed period at negative PT can be a lot of things, stress, hormonal changes, or sometimes implantation bleeding if the test was too early, kaya best talaga na checkup with your OB para ma-rule out properly and ma-ease your mind. A few of us tried testing again after a few days kasi ang PT accuracy depende sa HCG levels, pero walang substitute sa doctor's exam talaga, lalo na pag may spotting involved. Sending you positive thoughts!