I had a breast reduction on 29th November last year and it was the best day of my life. I was a 32/34HH (it depended on the make of the bra) and miserable with them. The rest of my body is a size 10/12 and I looked ridiculously out of proportion, prompting stares all the time. My back ached every day and my breathing was laboured because of the weight crushing my chest. I had to buy clothes that were a size 18+ just so that they would fit over my boobs.
I had thought about having a breast reduction since age 16 and at 19 went to see about getting it done on the NHS. I was told I didn't qualify......(ridiculously!) So early last year (I'm now 22) my parents were generous enough to pay for me to have it done privately. I spent months researching different clinics and surgeons and finally underwent the operation. I was in the private hospital for one night, and up and about after 4 days. I really expected some level of pain, but honestly, slight discomfort was all I felt. The only thing that was a nuisance was a bit of the incision was stubborn in healing but after wearing a plaster-sized dressing since the op it is now fully healed. My scars are minimal, and are about the size and colour of a red biro line.
I had an extremely positive experience and can honestly say that this surgery has changed my life. I feel happy and confident with my new 34DD boobs. HOWEVER, please do not take this as me saying "yes, go get surgery, its awesome, it'll solve all your problems!" etc. Surgery is a huge deal, it is expensive (I'm assuming you will not qualify for NHS) and does not always go as smoothly as mine. I was lucky that my body healed well, but I also was responsible and spent time finding a good surgeon who I liked and felt comfortable with. PLEASE do not think surgery is the answer without thinking long and hard about it. You should be very unhappy with how you look before you decide to go ahead, and even then do not think it will necessarily make you happy. If you're just a bit miffed at having big boobs, then learn to live with them, some girls would love it! Unless you know that it will always make you really desperately unhappy then don't go for surgery, it is not the option for you.
God, I've rambled on for ages, sorry. This is just an area I feel so strongly about having been through it myself. Please feel free to PM me if you would like to chat more about it
xx