Is this Kyophosis?

Dear everyone,

Hope everyone's fine there.
My name is Saif and currently I am 19 years old (male adult) living in Pakistan.

Directly speaking about my problem, I am having a minor or maybe a major spinal curvature of the backbone throughout the medial borders of the two scapula. Although I do not feel pain normally but when I try to stand more than an hour, it starts paining. But I m not concerned with the pain. Actually its about my physical appearance.

When it got appeared:
I was on puberty and at that time somehow my physical appearance changed a lot. I was considered a fat boy before puberty and after that, my height grew considerably high and I got extremely thin. At that time my height was 5'9" and my weight was 54 Kg.

From that time after I became tall, it started to feel pain on my back whenever I tried to stand for a long period, forcing me to sit somewhere and relax.


Causes (that I think) of spinal curvature:

While on sitting, I couldn't and still can't sit straight for a long period and without my notice, my backbone automatically bends into more relaxed position. This several time bending action might lead me to kyophosis.

When I was about 7-8 years old, I used to play video games, read books a lot, sitting on the same place for several hours. If I remember, my backbone always bended that I did not care at that time.

What I have done myself (without consulting a physician) to straighten it:

1. Firstly, whenever I notice that my backbone is bended while sitting, I try to straighten myself up but once my attention goes into something else the latter again bends.

2. I ve started excercise from age 15 in the gymnasium and started lifting weights while standing as well as sitting. The gym instructor noticed my back and instructed me to do back pull with the help of a pulley. Further he told me to do back shoulder lift. What resulted was just the increase of muscular mass on my back that made the curve more hidden.

3. When I walk, I try to widen my shoulders so that the curve at the back gets more inside, but while doing that, I look odd from the front. hehe.

So now I have decided to take opinions with you all. Please help me before it gets more worse. Any help will be appreciated.

And thanks a lot for giving a huge time for reading my huge post.