Medical Help

Hi I really need some help with this situation. The doctor said they won’t answer me because I have to pay my bill first. I started my period 8 days early, 14 days after my last cycle, and I figured it was because I was losing weight. Although it’s abnormal, my mom and I didn’t think anything of it. I finished my period about 3ish days ago. Today I was getting cramps and thought it was food I ate. Then I went to the bathroom and realized I started another period. Does anyone know what’s happening? My cramps hurt so badly.