Sigh!!!… I have not a clue what to do…????

I think that I am pregnant but I don’t want to be. Know I am having symptoms of pregnancy like; getting hungry a lot faster, I’m urinating a lot more often than usual, I’m sleeping a lot more, am having cravings, and it’s obviously a lot more difficult for me to stool. However, I don’t want to be pregnant NOW because I have a lot more to do before I have a child in my life and am only 21 years but I have to deal with it. What I really want is some advice and how to even prepare myself to even start to take a pregnancy test…..?????????

Plz, I am stressed out.