Hello Bella, I am understand your anxiety. And from what you have explained above, it seems as though you suffered a spontaneous abortion. In such situations the contents are expelled out along with blood which looks like a regular period. My advice would be to convince a doctor for an ultrasound to confirm the same. As your previous pregnancy test revealed a positive result and the current one is negative, it is highly likely that you have are not pregnant now. A pregnancy is detected through your urine and blood with the help of a hormone called the Human chorionic gonadotropin, which increases once a female is pregnant, it also peaks at 8-11 weeks of pregnancy, which I am assuming you are in/around. And for your results to come negative, should only be because you are not pregnant now. Discussing your concern on increased abdominal girth, an abdominal ultrasound would really help, as at times fetal content is not expelled and we need to rule this out. Hormones are at their best in and around pregnancy, which could cause an increase in appetite, emotional instability and changes in urinary and stool cycles. In my opinion, you are most probably not pregnant, but for your satisfaction you could repeat a pregnancy test and request a doctor to conduct an abdominal ultrasound for you. Wishing you good health.