The dentist isn't going to biopsy leukoplakia which almost every smoker has to some extent, and dentists see all the time. You don't need a biopsy to diagnose something he sees every day. The little hard spot on your lip is also likely something very common, a mucocele, which you have described to a T. It's just a clogged micro pore in your mouth which has thousands of them in the tissue. Google it if you need to know more about it, but they resolve on their own, usually after forming (finally) a little clear blister. The papilla on people's tongues gets enlarged sometimes when it gets irritated or there is a bacterial issue at play, again not a sign of cancer.

So your post from early today is essentially a repost of your original post to the forums some time ago. Once again I tell you that we are survivors and patients, we cannot help you with a diagnosis. Someone has to look in your mouth, (which you have had lots of qualified people do), and tell you it is cancer before any of our knowledge and experience is going to be useful to you. We'd be happy to help you further, IF you have the misfortune to join the cancer club. Until then, searching for answers on web forums isn't going to get you what you obviously want, a biopsy. Best of luck in getting that, if you do, it will likely put all the cancer thoughts to bed. If you don't you are going to have to live with the opinions of the may doctors you have already seen. Re asking your question here again isn't going to change anyone's ability to help you further. Good luck.