Spotting for almost 2wks, missed period due last week. preg test neg, transvaginal ultrasound all clear. ideas?

Cycle changes: may be due to multiple factors: female or thyroid hormone fluctuations, agem stress, tension, anxiety, depression and underlying medical conditions.I suggest keeping a menstrual journal- (S)- start, (E)-end, (SP)-spotting, (L)- light , (H)-heavy and (C)-clots. Keep this monthly journal and give it to your GYN on your next visit. You will need a pelvic exam and blood testing as noted.