I think this might make more sense if I start from the beginning, so:
A week ago I felt like I had a lump stuck in the back of my throat. No pain, just annoying. The next day it felt like it had moved down my throat, still no pain.
The third day it felt like it had moved down again to the bottom of my throat, but I was also in a lot of pain. My glands swelled up massively too and it was excruciating to swallow, even normal saliva. Where the lump felt like it was also incredibly painful when I swallowed. In addition I had stomach acid rising, so every time I swallowed something it had to pass glands (painful), then the lump (painful) then the acid (painful). I was miserable.
After a couple of days the throat has started slowly getting better, but now my tongue is wrecked too! Near the tip the surface has cracks in it, and going back there are circular lesions, varying approx 3-6mm across. They're very sore and look like the top layer of my tongue has come off. They are sunken and uniform red in colour, not ulcers!
Has anybody got any suggestions as to what this is? It's the weirdest sore throat I've ever had, and I've never seen a tongue like this. Is it contagious and how do I make it stop hurting?!