Weakness while on period and very sore body

Jasmine • My name is jasmine I`m a fun and happy girl
I'm on my period and I don't be as hungry it's like my appetite is not good and I am very weak and I only weigh 95 pounds and my bones are fradgil but it's only when I'm on my period and I went to the doctor and she said I'm healthy but I cough and throw up blood does any one know what it could be?