Welcome to the forum. There has been a lot of media attention to these issues in the past few years, some of it quite alarming. But you are overreacting in a big way. Your sexual history does not put you at any significant risk of throat cancer, which remains very rare.
As it happens, virtually the identical question was asked 2 days ago. The only HPV strain associated with throat cancer is HPV-16, which is among the most common genital HPV types; at any point in time, a few percent of sexually active people (as a guess, 2-5%) are infected with HPV-16. That means that in the US every year, there are millions and millions of oral sex exposure to those persons. And yet such throat cancers occur in somewhere around 10,000 persons per year -- one of the rarer cancers.
Below is a link to the thread from 2 days ago. In it, there is another link to a discussion that goes into more detail about oral sex, oral HPV, and cancer. You should find both of them reassuring. After you have read both, feel free to return with a succinct follow-up question if there is anything you don't understand.
http://www.medhelp.org/posts/STDs/Throat-cancer-risk/show/1457445
Best regards-- HHH, MD