Hello, My Name Is Sarah Wright Im 24 Years Old

hello, my name is sarah wright im 24 years old iv bean experiencing some changes and odd behaver with my body the last 6-8 mouths and i was wondering if i could get some health advice. it all started with missing my period its odd for me to miss my period mine are usually pretty regaler and has bean scence my first one , then i notest i was losing a great amount of hair it was almost like i was shedding like a dog i have lack of energy im sleepy almost all the time i also have pressure in the left side of my head it isnt content but often