Hi, just looking for some advice. I'm 28 y/o male, married and have a 7 y/o son. I have a few concerns. My GP didn't really seem interested over the phone and didn't offer me a face to face appointment.

I'll keep it straight forward so it's easy to follow. Symptoms:

1) Breathlessness which can be slight to quite noticable to people around me for at least 6 months 

2) cuts all over my legs (both buttocks) from itching that won't heal for at least 5 months.

3) A painless Lump just under my right jaw line (possibly lymph gland?) it's sort of a bean shape, with a minimum size of 1inch, noticed this 12 days ago and it's not getting smaller.

4) I had bloods taken about 4 weeks ago for an unrelated reason and i had a call from the clinic regarding an elevated platelet count. This was 451 so not too high but they want to take bloods again to make sure that goes back down.

5) I have been a lot more fatigued than normal for the past month, feeling a lot weaker than usual, especially my grip for some reason?.

6) My appetite has been gradually getting worse to point where I'll have tiny breakfast and a little sandwich for the day. I'm getting full so easily, to The point where the food feels like it's up to my chest. This causes me to feel sick and I feel very bloated afterwards.

7) I get occasional pain In various parts of my body which can vary day-to-day. This can range from pain in my left side abdomen, shooting pains down my ride or left-arm, sharp pains in my chest, And general dull pains In my upper body. These rarely ever get so painful that I feel the need to mention them as they generally come on go as quickly as they came. 
8) I've also been experiencing frequent Nosebleeds, which started around 2 1/2 months ago, these tend to last 5 to 10 minutes before I can take off the tissue without it bleeding. I've had weeks where I've getting them most days, And weeks where I may only get them once or twice a week.

There may be more that I can't think of at the minute, however I have a deep sense that I know that something in my body just is not right at the minute. I am not a Hypochondriac by any stretch of the imagination, in fact it would do me well If I was more like that.
My GP told me yesterday (over the phone) to wait for another 4 weeks before getting another appointment to see if things are still the same (or worse). 

I do intend to contact my GP before the four week period I was advised however after reading some of the posts on this forum I think It will do no harm to write out My current situation and see if I can get advice from the kind people on this forum.

kind regards 

Adam