Surgery is not necessary to determine what is going on with your neck. The doctor, TODAY, could do a fine needle biopsy, something that is only a little uncomfortable and will give him cellular material to have analyzed in the next 48 hours. You should ask for this, if this node has remained the same for an extended period of time. If he is unwilling to give you better answers to what is going on, he should refer you to another doctor for a second opinion, or you should seek one out yourself. As to the roof of your moth, I was going to say that this was a torus, but you mentioned that it has recently appeared. It may be a cyst, or something else, but at minimum, radiographic examination should be conducted. An oral surgeon who has a Panorex in his office can do it in just a few minutes and offer you a professional opinion. Whatever path you choose, it shouldn't be to wait and wonder.