Is oral cancer likely if i have only used chewed for 2 years?

Yes: Yes, it can still happen. It's not necessarily a time thing. It also depends on your genetics, other health history, and exposure to other substances (drugs, pollution, industrial, etc.).

No: Exposure to the toxins in chewing tobacco when very prolonged create the greatest exposure to oral cancer. Have your teeth cleaned frequently and request the clinician to check visually and with a velscope if they have one. That is the best way to watch for damaged tissue. And don't use it again. It really is bad for you systemically with addiction and local tissue with contact.

Unlikely: Although possible, short term use of smokeless tobacco is very unlikely to cause oral cancer by itself. If combined with smoking or alcohol use, then the chances go way up. If concerned, see your oral surgeon asap.

No: At your age, oral cancer from chewing tobacco is unlikely. The worst form of tobacco use for oral disease is using snuff, which is packed into the lower lip, and in contact for a long time. It starts by making the tissue whitish, and then cellular changes may occur. Good that you stopped!

Unlikely: But not impossible. There's no easy way around this. First, quit ALL tobacco use immediately. It's addictive and causes cancer. Your Dentist and/or your Physician can help you quit. Second, see your Dentist immediately for a thorough oral health examination, including an oral cancer examination. Your age and relatively brief carcinogen history are on your side. But go find out and get help.