What Causes Light Vaginal Bleeding Along With Low Appetite And Weight Gain?

Hi doctor, I have stomach bloating with stretch mark and small line in novel vertically and uncomfortness. My period was also late with light bleeding without clots. I have fatigue, constipation, low appetite, weight gain. My hypothyroid came back to normal. Negative pregnancy test. I Dnt knw what is going on in my body. Help me By Arunmathi