Talk to Gynecologist on Weakness, Pale Skin, Low Periods Flow.

AOA, period flow is decreasing gradually .it was five days a week but now it is up to 2to 3 days . quantity is also reduce . my Skin is also turning yellow, even palm of my hand is turning yellow. also feeling fatigue.i had history of pcos 4 years back. after getting good diet n excercise I overcome ay that time . my periods are regular. I still have excessive hair on my chin which is exceeding .also I feel back pain. in morning I have swelling on my face . I am worried about my periods flow . I am not married yet . please give me your kind suggestions why it is happening ? what to do? .thank you on advance . Bless you all.