Hi Saira ,
Welcome to HCM.
Thanks for writing in.
It seems you have multiple problems.A detailed hormonal work up would be required including LH,FSH ratio and testesterone levels.
Under eye dark circles
can be due to anemia,stress, lot of computer work,inadequate sleep ,liver disease etc.
Few nutritional treatments like biotin and calcium pantothenate
can be of help in preventing hair going grey.
Use a good quality moisturizer over face and body like Venusia lotion.
Moreover treatments are now available for uneven skin tone
and hair ranging from medications to lasers to chemical peels
Consult a good dermatologist
for proper treatment.
Hope this helps.
Wishing you good health.