sagging breasts problem

Hi All

I feel somewhat to tell this problem but I could not discuss with anybody else so I thought this is the best forum for me.

I deliverered in 2005 nov and my son is 2 years old. I breast feeded him until he was 18 months old. I used to breast feed him while sleeping. I think this is one of the reasons of my sagging breasts.

now both my breasts are sagging and they are not firm.
watever kind of bra I wear..it doesnt look good. and the shape is out.
many of my freinds have pointed out

pls suggest me how to overcome this problem and bring my breasts back in shape.

I feel so bad about this.
pls help me

Thanks
Jaishree