About 5/6 weeks ago, I found a lump in the left side of my neck - it is quite low down, I would say near (as opposed to on) my collarbone (roughly one cm above where my neck meets my collarbone). I gave it a couple of weeks or so to settle down, then contacted GP who said it appeared to be a deep cervical node, and to leave it just another ten days or so more. It still hasn't gone down,so a different GP organised blood tests (all of which came back within normal range, and no suggestion of infection). She has referred me to a specialist for further testing, so just playing the waiting game. I am a 22year old woman, no huge health issues (bar ibs and sometimes anaemia (due to heavy periods)), and normal wieight, non-smoker. 

Of course, I am very anxious as I know neck lumps can mean lymphoma etc. However, I do know that lymphoma has good prognosis rates. My big fear, is that this is a 'troisier's sign'/ 'vichrow's node' - the swelling of supravicular node on the left side of the neck/collarbone, that can mean late-stage stomach/gastro cancers. I have had ibs since I was about 11/12, and my anxiety sometimes causes stomach pains. Now I am worried that these actually have been something else all along. 

I keep googling and googling to try and work out if these nodes are supravicular or not - it is all very confusing, for every medical journal/website that says my lump is where the vichrow's node is, there is another article which says it is further away from the neck/deeper into the collarbone etc.

Very worried and anxious, and really do not know what to do - I don't think I mentioned the IBS when I spoke to the doctor, and I'm now worried I should have.