What should I do as a hypochondriac with concerning health symptoms?

[Dupackie92]

For the past year and a half it has felt like I'm slowly wasting away and dying. I have some good days when I seem to feel okay but they've become few and far between. I have obviously developed a pretty severe hypochondria and I have just started to see a therapist to try and address that, but the physical symptoms persist. During this time I have seen multiple doctors and have had many different tests done, all normal. Now I feel like the boy who cried wolf. I was so sure that something was wrong, and hoped they might find it, but there was nothing. Now I'm still certain there is something very serious going on, but I feel like I've exhausted the medical services available to me. Understandably, I think it's difficult for a doctor to taoe my concerns seriously, and I'm too embarrassed to visit anymore.
Current symptoms: recurring feeling of pressure in head, (temples and sides); pressure in nose; a blocked nostril; a mass about the size of a golf ball deep in back of neck left side close to spine; thickened bumpy tissue in back of mouth/start of throat that has grown (cannot see but can feel with tongue); throat frequently feels raw; two firm quarter+ sized masses below chin (assuming enlarged submandibular saliva glands); other smaller firm lumps in neck; thickened, discolored patches of skin at base of neck and under armpits; numerous firm pea-sized lumps in both breasts and trailing into armpits; firm lumps felt in groin; numerous new raised red spots all over skin with crater; and other more general symptoms.
I'm 30 y/o m, feels like I'm venting here, don't know if this is the appropriate place for this but I'm at my wits end, I feel like if I bring anything up with my doctor he does the bare minimum to placate me and convince me I don't have cancer.
Should I seek a second opinion? At this point the more specific symptoms seem so obvious they couldn't be missed if a doctor is willing to look closely. And I also struggle to differentiate between what is a legitimate concern or just my illness anxiety going into hyperdrive. I have literally been convinced I have cancer the last year and a half, even before there was any obvious indicator. Intuitively, body just did not feel right.
I plan to continue seeimg therapist to try and address the anxiety and its causes, but these physical symptoms are more than I can ignore.
Any thoughts or advice would be appreciated.

[Paxiled]

If you chronically think anxious thoughts that are irrational, you have an anxiety disorder.  If you truly have physical growths as you describe, anxiety doesn't cause that, but it can cause you to think they are there when they aren't.  If you've only seen one doctor, and not a specialist of any kind, you might consider a different doctor.  If you've seen a lot of different doctors and all agree, then it's probably anxiety.  One thing that stands out is the possibility of a thyroid problem, and doctors are terrible at finding them.  You have to pretty much lead them by the nose to do the proper testing.  If you don't like your current doctor, get a different one.  But if you are satisfied with your treatment, then it's anxiety.  

[Dupackie92]

Thank you for your thoughtful response!