Pcos problem. Unwanted growth of hair!

I've been recognized by pcos problem...and my periods are irregular.....irregular in the sence menses is not at all taking place since 4 months...my weight before 1 yr was 45 wich was ideal for my height..but at present I'm increased by 10 kg and its really tough to reduce my weight..and many skin problem r causing me so much if limples on my face and also suffering from hair fall and most bad experience is the growth of unwanted hair in my face ,chick,on my breast and thigh areas..dis is very disgusting and its decreasing my self confidence ..... my doctor suggested me to take a 6 months course tablet but I'm affraid that if there would be any side effercts of over weight...as i have already trying hard to reduce my weight and if the medication caudse another side effect to my body ...plz suggent me the best way to get rid of all my periods problem,weight and unwanted growth of hair