Welcome to OCF! Not knowing whats wrong can be very frightening. Especially if you are doing internet searches and running your symptoms all over the internet. It will provide some very scary results.

First, Im not sure if you are still using tobacco or nicotine products as you said "Yes I smoke". So if you still do then get rid of all the tobacco and nicotine products immediately. There are hundreds of chemicals in tobacco. Even chewing tobacco has all kinds of things added so its not a good substitute for smoking. Better to avoid all those irritants completely for good. As a former smoker I know its not easy to quit, but if you do it now you greatly improve the odds of living a long healthy life. Because of my 'habit' I went thru oral cancer 3 times within 3 years and now I am permanently disfigured. As an adult you should be aware of the dangers of using tobacco. You didnt come here to get a lecture so I will stop giving you a hard time about it.

Any sore you have in your mouth that is there for over 2 weeks needs to be checked by a professional. I suggest an ENT who specializes in oral cancer to check the lump and do a biopsy. The other symptoms you mentioned in the final paragraph should be checked out with your family doctor (colds, coughs, uti, etc).

At this time there has not been any hereditary links found for oral cancer.

I hope what you have going on turns out to be nothing serious. Keep looking for an answer. If you have the biopsy done you will know for sure if you have cancer or not.

Best wishes!