Sonia where are you being treated.? I'm going to say the pain is somewhat normal post op but at six weeks you should be better - the highlighted glands to me are a warning sign - 1.9 cm is big not small mine was 2.4 and I had nodal involvement - I absolutely would not wait until may to have my neck checked - you need to see an ENT who is a cancer specialist this could mean the difference between living and dying. Lots of ENTs who aren't overly familiar with cancer make the mistake of thinking they've got it all after removing the tongue tumor. Sometimes they do but a lot of the time the cancer has already seeded to the nodes. I would absolutely NOT wait until may.

Best of luck.