Okay so I’m after a bit of advice.
About three months ago I went to the doctor as I was extremely fatigued and thirsty. Around that time I had been feeling some discomfort in my chest/lung area and occasionally pain. Also during this time and up until about a week ago I had been experiencing what I guess is night sweats, I wouldn't wake up to (nothing wakes me up) but every morning I could smell sweat on my clothes and only once or twice I was covered in sweat, but never thought anything of it, even though it was winter/spring time. I had a blood test taken to check my blood sugar and a few other things (don't remember what) and all my doctor said was I don’t have diabetes. He also checked my breathing but said absolutely nothing. Soon all symptoms went away.
About a week ago I found a lump on my neck under my ear. I don't think it is noticeable and it is quite soft and painless. The pain in my lungs has returned, although worse. Right now I am sitting on my couch and feeling slight pain. I can't get comfortable. My upper back has also been annoying me, it starts to hurt for no apparent reason, however if I sit down and lean my back against something it does feel better. Yesterday I walked up about 20 stairs and I got slightly puffed. I'm really tired again, and generally feel like crap. I had already been taking iron tablets.
Should I go back to my doctor, and what should I do again if he doesn't find anything wrong again. Is it worth worrying about, or should I try a different doctor? I don’t want to go in there sounding like a hypochondriac but I want to find whatever is wrong, if at all. I haven’t been sick recently and have no explanation as to why I would have what I suspect is a swollen lymph node.
Also I should add that I am 18 and female.