I am only 26 and had to get an upper denture at 24 because my teeth are so soft and had many problems. It kinda felt like you had a wad of something in your mouth at first, but that only lasts for a day or two. I had problems with my s's for a while. I would almost kind of whistle whenever I said a word that had s in it. I just practiced talking when I was alone and it cleared up in a short time. As for eating, go with soft foods for a couple days at least as your gums will be sore. After a month, I would imagine you will feel like it is just part of your mouth. Good Luck!