Cameron,
Welcome to OCF, glad you found us and really glad you've stopped dipping...it does cause cancer you know
Oral cancer isn't genetic so there isn't a family connection there.
The two main causes for OC is
HPV and tobacco usage. Now I'm assuming you are the typical 25 year old student and have had more then 5-6 sex partners in your time so odds are you have more then just tobacco usage as a risk factor. In any case you have risk factors and they are reason to be cautious with anything going on in your mouth.
Typical thinking for most males is with either side of their pants, crotch or wallet. Both have a tendency to get us into trouble. If you have OC putting it off due to fear of expense will kill you. I'm sure you don't have a price tag on your life...being a bright young student and all. Schedule an appt with an Ear Nose & Throat Dr and have him check you out, spell out your concerns. Typically at your age tobacco won't be the cause, although it could be, more then likely
HPV.
In my opinion there isn't a price for peace of mind and if caught early not only will it be less expensive but your odds of surviving it are better too.
That's all for todays lesson folks...the professor has left the building!
Eric