I hate my hair! HELP!

I absolutely hate my hair! IT NEVER GROWS! I want to get extensions but I can't afford them. I've been trying to find some cheaper than 100$ that are real human hair and that will last me a good while but I can't find any! My hair is one of the things that makes me so insecure about myself. Not to mention my terrible dry skin that makes foundation look terrible no matter how much moisturizer I use. Does anyone have any good clip in hair extension recommendations?! I need 100% human hair and I really can't afford more the hand 100$ see as all my money goes towards medical school. I just want something to make me feel good about myself. I'm over feeling so down about my look.