So to start I'm 25 years old (male) and used to be a very fit and healthy person.
 

So 12 months ago, I started with pain in my groin and around my testicles. I waited a month and nothing changed so went to the Doctors. I was initially dismissed by the doctor who said it's a muscle strain and to give it time to recover. I waited and waited and nothing changed so went back. The doctor did a physical examination of my groin and testicles and told me he couldn't feel anything out of the ordinary but sent me for an ultrasound of my groin. I went for the scan and I had a 'small active lymph node' on the left side which I was told could be causing the pain. This was back in June and the pain hasn't eased since.

in October, I started experiencing armpit pain and stomach pain. I rang the doctor to update them on this new pain and was sent for a colonoscopy and blood tests. The colonoscopy came back clear. The blood tests were all clear other than my liver (alt was 54) and platelets were low (118 10*9/L). These were repeated after a month and my platelets slightly dropped and my liver slightly improved. My armpit and groin pain still very much so present. I have been asked to repeat bloods again and the doctor has requested another ultrasound of my armpit this time. 
 

I have recently started noticing little blood spots under my skin under my armpit and around my rib cage. These usually are a cluster of tiny pin head blood spots. The patches of them usually aren't more than a couple of centremetres. 
 

The reason I'm writing this is because reading online I notice all of these symptoms link to some kind of lymphoma, leukaemia type cancers and I'm getting very concerned that the process has taken over a year and I am no further in understanding my issues. I'm looking for some reassurance/advice on what I should and shouldn't do. I'm worrying every day and it has consumed me for the majority of this year. I have built up such an anxiety that I have cancer and doctors don't seem to be recognising these worries.

I have stopped exercising because of pain, stopped taking care of myself because I'm so worried and I feel like I've spiralled into a really dark place. I just want to know where I'm up too if I should be worried.