Hi Sophie,
I was also diagnosed with T1 SCC on right side of my tongue. Mine was treated surgically. I have had 4 surgeries and they are not easy, but I didn't have to go through chemo or radiation. I totally understand how you are feeling and I'm sorry you are going through it.
I highly suggest getting "scanned" I went for PET scans and they found a lung nodule. I now see a surgical oncologist for my tongue and a pulminary doc for my lung. My doc is not worried about lung so I only see him every 6 months. Quite honestly the oral doc knew about the lung and did not tell me. His nurse told me by accident and I freaked out when I learned they knew about it a year prior. If you het PET scans, they have a lot of "false positives" which can be annoying. That is why my oral doc didn't say anything to me about the lung.