Any ideas as to what's causing my pain? Do I need to go see a doctor or just wait it out?

[Photography731]

I am a fifteen year old girl and I am very active. For the past two years I have been diagnosed with Costochodritis on and off, so when I started having pain of the rib cage I assumed I had it again. When the pain flared up I realized that the chest pain wasn't the source of the pain. The pain seems to be coming from my right side and the mid right side of my back, which radiates to the chest on occasions. The pain is very severe when it flares up, which occurs with deep breathing, laughing, exercise, and lifting, but also hurts a great deal when I am relaxed and breathing calmly. The pain is actually much worse than I've experienced with Costochodritis and as a general rule I have a very good pain tolerance. I can't recall any falls or bumps into anything in the past month or so. I haven't had any upper respiratory infections or surgeries of any kind. I exercise quite a bit and thought maybe I had strained a muscle in my back, which I have also done before, so I rested a few weeks without the slightest improvement. This pain also causes problems with sleeping. The pain gets worse and often wakes me when I roll onto the right side or sleep on my back.  
I really hate going to the doctors office, and if it's nothing serious I'd really hate to waste money to be told it's nothing at all, but if it sounds like something serious, I'd like to have something done before it gets worse or causes more problems.
Any help or advice I can get as to what may be causing my pain will be greatly appreciated.

[watto1]

You know your symptoms could also be something as simple as torn rib cartilage or cracked ribs. They really hurt after laughing hard, sneezing, coughing etc.

Usually take about 6 weeks to heal, lay off contact sports  

[watto1]

Edit... sorry COULDN'T sleep

[watto1]

I'm no doctor and maybe this is a totally different condition? I had a problem at the same age that sounds similar. Doctors could not diagnose it at my local hospital and then it went away, before returning years later with much less degree of pain.

Both of my elder sisters also had the same problem in later years and the second was diagnosed with something called sponataneous pheumothorax (I really don't know how to spell it).

I believe it was air bubbles in the lungs, that self implode. My symptoms were having the feeling of 'the stitch' we used to call it when running.  Chest pain. I could hear my heart beats by ear, very loud with a double beat sound which was the wound sticking to heart like a suction cup. The first attack was most painful, lasted for more than a few days. Could sleep because of the noise and pain, and lying on one side gave a sharp pain in opposite shoulder.

From memory I had 3-4 minor attacks thereafter over a 10 year period - nothing for almost 20 years now.

My sister was advised to never scuba dive and no flying if the symptoms exist.