Next steps to diagnosis Lung cancer, I'm scared ?

[oddtropical]

Ok so here it goes...
I'm not sure if I will be able to accomplish something with this post, mainly because I'm aware that a lot the questions I have could only be answered properly by a healthcare professional evaluating my specific case and with a battery of test but I must warn you guys that I live in a third world country with a LOT of problems regarding the health system (most hospitals doesn't work, a lot of common exams in the US cost a fortune here or are not available at all) keeping this in mind I'll elaborate further to see if anyone has some advice for me (I have never been so anxious in my entire life)
During the last 2 years, I have experienced a couple of symptoms (in a progressive manner) that make me very nervous especially thinking about lung cancer.
It all started with a small sense of discomfort in a particular place of my back (left side about an inch away from the spine). That feeling comes and goes and at this moment I'm not exactly sure if there is any action that triggers it, I do know that sometimes when I exercise it becomes a sharp pain that lasts for a couple of minutes similar to the pain you get while exercising without a proper warmup, all focused on the same spot on my back.
Taking deep breaths can be enough to experience the discomfort in that particular place but I also have a more generalized pain in the left side of my chest and back that I can feel to the touch and especially when I take deep breaths or stretch my upper body (I think is pleurisy).
In addition to that I have been experiencing irritation in my airwaves mainly in my esophagus/throat, sometimes I feel pain in that canal around the chest area to be more precise, where both nipples would join if you drew a straight line between then).
And finally a couple of months ago I found a little bit of blood in my sputum and this got me really scared, ever since I've been extra aware of any phlegm I might expel while coughing (this has become a habit for my and I can't seem to get it out of my mind, actually I think that the constant induced cough could be contributing to my general airwave irritation and eventual blood in the sputum). The blood has appeared again in a couple of occasions over the course of the last week, those times it's been a more significant amount (about a teaspoon mixed with the sputum, Bright red fresh looking blood).
I think I have a little shortness of breath at nights but at this moment I'm not sure if it could be my anxiety talking since I don't feel any harsh difference in my endurance while I exercise (apart from the pain in my back I mentioned earlier).
Basically, those are my symptoms. I'm really scared of the perspective of getting worse and not being able to do much about it. I really hope this is just a big coincidence but I would like to hear from someone who has more knowledge about lung cancer if they have experienced any similar symptoms and basically how alarmed should I be.
Tomorrow I will go get a Chest X-Ray which is one of the few available tests I can get, and visit a doctor ASAP.
I'm 26 years old, male, heavy smoker (cigarettes and weed) for the past 10 years (I stopped cold turkey about a week ago out of sheer fear).
If someone can give me a professional or empathetic opinion I would be really grateful, and also, what would be the safest way to diagnose or discard lung cancer in a situation like mine with limited access to limited health professionals and tests.
My thanks in advance.