Hi, I went through something like this a few months ago - I was not sick, but the right side of my throat started hurting when I swallowed. Of course being a hypochondriac I started thinking I had throat cancer. I looked back there and saw a white thing - it turned out to be a tonsil stone. I had to literally scrape it out - I looked up videos about it on the internet!! It was kind of gross. But that's all it was, tonsil stones are really common. I bet that could be what your white spot is!