I am 17 years old and I am scared that I could be pregnant. I had my period on December 24 and had sex with my boyfriend on 3,4,5 and two days ago I started feeling really hungry... and every time I eat I feel like I never get full... and I don't want to tell anyone because of what people may think of me... I know people will tell me to wait and get a test but I have no money and I have to find a ride to the doctors (my b/f doesn't have a car at the moment) if it is a possibility... another thing I have noticed is I get like cramping but no period... I hope its just me but I guess anything could happen right?

If you are not on birth control and/or not using condoms and having sex, then of course you could be pregnant. That is what causes it.
There is just no way to tell, some people have this sign and others don't ever have hardly any signs. There are home tests which you can buy that are not that expensive. And since there is a boy invovled, can he not drive you to a clinic.

It could also be in your head. Go get a home-test.