Hello Thank you for your query. As the blood test was negative, you are mostly not pregnant, as it is more reliable than the HPT. HOwever, since you are having pregnancy symptoms, I would advise you to go for a pelvic transvaginal ultrasound, as that will further clarify the picture. There could be various causes for a lighter period / spotting which include reasons like stress, anxiety, fluctuations in weight, thyroid disorder, polycystic ovaries, hormonal medications, endometrial thickening and irregular shedding etc. Consult your gynecologist and have an ultrasound, because none of the symptoms you mention is confirmatory of pregnancy. take care.