I'm scared that I could have lung cancer, I've really struggled with my breathing for 3 years now roughly, with having two back to back pregnancies I kinda let my self go so my weight isn't good at all, my BMI is on the obese range and I'm just struggling to loose weight regardless of the amount of crazy diets I do, I don't drink fizzy I completely avoid it, I'm also 5ft3. 
3 years ago I had bacterial pneumonia right after having my first born, I caught it in the hospital, it was dreadful. The most ill I had ever been, I was coughing bloody mucus daily, I couldn't breathe properly at all, it was traumatic, especially with my baby being in the Nicu. 
I had a lung function test 3 weeks ago, my lungs are the age of 45, this really scares me, I asked my doctor is this a long term lung disease or cancer I should be concerned about? He said no he's not concerned but he thinks my vaping and weight is to blame 

ive smoked cigarettes for 8 years, I know it's terrible believe me, I feel bad enough as it is. I thought switching to vaping would be much better then I'd be completely free of the cigarettes right? Turns out the vaping is a worse habit. I gave up cigarettes 5 months ago, 5 months cigarette free, but the vaping has been a terrible habit, I've now reduced the amount I vape, use nicotine patches, but my fear is still there.

I shouldn't feel like this at 21 years old, everyday I'm in pain, I do think some of this could be due to my mental health having a daughter with a rare lung disease on palliative care, slowly deteriorating more, uses oxygen and a CPAP, she's 2 years old, spent nearly all of her life in hospital. Her lung disease is by her genetic makeup of being Down's syndrome. 

But everyday I am in pain, my upper back and shoulders are in agony everyday, where even sitting can hurt, standing hurts. My breathing is terrible I get really out of breath over minimum moving about, I mean I get on with it but I'm in pain. Breathing in I feel tightness in my ribs, have a chest infection roughly every month, arm pain daily once or twice, mid rib pain. Something just don't feel right, had a chest x-ray two months ago just showed I had a chest infection (once again) but it don't feel right to feel this unwell everyday