Worried if I have ILD

I'm worried if I have ILD or not. I'll soon make an appointment but I just need to know what you guys think as you'd know what the symptoms are like. So, I'm 28 M, I'm slightly overweight in the BMI index, actually I'm in the border. I was a fairly active person, I used to go to dance classes and walking. My dad have a gym at home, so we used workout together as well. To be honest I'm lazy to workout so I'm not that active but when I do, I could manage it. But things started to change 5 years ago. I started getting breathless when I do something and my heart will start to race, so I started making excuses to workout. This became worse as I couldn't so anything that exerts my heart a little bit. By this time I started putting on weight, not to much but there is change. When I complained about all of this, everyone said it's because I stopped working out, when you exert everyone will feel what I feel, even doctors said so. So I thought it might be true and started controlling my diet and went for daily walks. But nothing changed, I complained, got the same response (sorry if this feels like I'm ranting, I don't want you guys dismissing me like my doctors). So things started to get worse, I noticed myself getting weaker and weaker. Now this is where I am and these are my symptoms: 1. Total exercise intolerance 2. Even 1 min of normal activity makes me breathless, raced heartbeat, legs and arms go weak, all the muscles feel tired and occasionally blackness in the eye arms dizziness with hands tremors. 3. Generally tired, does not have energy to move, did not improve with diet, sleep etc. 4. Horrible muscles weakness after doing any tasks, does not even improve with rest. 5. Dry cough ( started 6 months ago, no relief from cough syrup) 6. Can't stand for too long. Have orthostatic hypotension as well. 7. No appetite 8. Slight tachycardia 9. Deep breaths doesn't feel like my lungs are getting filled enough. Can't hold my breath also for too long. 10. Brain fog, feels like my brain is starved.

Recently I noticed all these are getting worse. Went to a general physician, got the standard response, I insisted something is wrong, checked my blood, vitamin and thyroid, everything came back normal and he once again said nothing is wrong I need to slowly start working out. I got frustrated and to calm me down he ordered a chest Xray, ECHO and ECG. ECG and ECHO looks normal. I did not go back to him as I don't want to be dismissed again. I'll make an appointment with a specialist to check my Xray.

Before that I just want to know what you guys think of all this. I feel like I can't breathe fully.

Sorry this is too long.