Hi Tasmin,
I've read through your posts. You've been having symptoms since last May. If indeed this was sinister, you would be quite ill by now. In one of your posts you mentioned having extreme HA. I've researched and studied this illness for quite some time now. Your posts are indicative of this.
You've had several doctors appointments as well as several tests including a biopsy that have ruled out cancer. I'm not a doctor nor is anyone else here but it would seem to me that you don't have cancer. However, in my opinion, you are suffering from an illness called health anxiety.
Are you seeking treatment for that? CBT, one on one therapy, meds or a combination thereof may be needed to get that Dragon under control. Anxiety can cause real physical symptoms that mimic serious illnesses. The truth is both can take your life. The difference is one can bury you under the ground and the other above it.
You're young and have much to live for. Perhaps addressing your anxiety would be the best approach in this situation. Of course not smoking and getting off the nicotine lozenges once and for all would be prudent as well.
Positive thoughts and prayers
"T"