I'm studying to be a dental hygienist, it's a good profession. But, seeing patients saliva makes me very uncomfortable.
Then i think it is a wrong profession for you. Which other things do you know about the career. 
Well, dental hygienists are the primary source for discovering oral cancer and helping people avoid it. So I'd be able to help a lot of people if I finish my studies.
That is what i think you should focus on rather than what the saliva of those people might do for you. I am sure there are way to prevent coming in contact with body fluids 
Yes, there's also a lot of opportunity to educate people in the field, and I like helping people learn how to keep themselves healthy.
Can you give me some health tips for my teeth to be healthy 
Regular brushing is very important! At least twice a day after breakfast and before going to bed. This helps to prevent bacteria that causes cavities from growing.