I just thought I'd update and say that I went to see the hematologist (who also happened to be an oncologist) yesterday. After feeling my lumps, he first remarked that they were not lymph nodes at all. He is pretty sure that they are cysts, and very small ones at that (according to him, they're 2 mm, if that), but he did schedule a CT scan for my own peace of mind. I feel kind of embarassed now, especially thinking that something was seriously wrong with me because I had hard lymph nodes that weren't going away, but if they are cysts then I guess they're supposed to feel that way. Thanks everyone for your support, though, and you are in my prayers every day.