Lump in groin

Hi all,

I've had a lump in my groin now for 6 weeks, the doc reluctantly saw me about it 3 weeks ago and said it was a swollen lymph node and said to call if it's still there in another week. So I did, and they've finally sent me another appointment for next week. It'll have been there 7 weeks by then.

it's just larger than pea sized, not painful.

ive just has bloods returned which were abnormal for white and red blood cells. I'm constantly tired. 
I'm finding because I'm being treated for anorexia at the moment, everyone is blaming all my symptoms on that and fobbing me off about the lump. 

im scared about the lump. I have the worst health anxiety relating to cancer, because I've lost a lot of people to it and my mum has stage 4 bowel cancer which was diagnosed too late for cure. 
 

has anyone else had a lump like this before?