Having back pain: Ouch!

It's been 2 months since I first felt the pain on my left back.
I think it caused by carrying laptop and heavy back pack everyday before I have my car.

What is back pain?
Wikipedia says that it is pain felt in the back that usually originates from the muscles, nerves, bones, joints or other structures in the spine.

Back pain can be divided anatomically:
neck pain, upper back pain, lower back pain, tailbone pain.

By its duration: acute ( less then 4 weeks ), subacute ( 4 - 12 weeks ), chronic ( greater then 12 weeks ).

By its cause: MSK, infectious, cancer, etc.

The pain may be felt in the neck (and might radiate into the arm and hand in the upper back, or in the low back, (and might radiate into the leg or foot), and may include symptoms other than pain, such as weakness, numbness or tingling.

I tried traditional massage for the back, but it remains.
I'm on acupuncture now, it needs to be done regularly, while I only go there whenever I have some free time over my working hour.
Another therapy I can get is physiotherapy.