Whoa, whoa whoa, HOLD IT. OP, you did SEVEN prep tests? That's it?! 168 is NOT a good representation of your potential. Actually, we're more twins than I thought. Seven is about how many PTs I did to get a 168. Truly studying for the LSAT means working through 30-40 preptests. I worked through over 4000 LSAT questions studying for that 175. Here's a picture of my study materials:
Is it a lot of work? Yes. It sucks. However, think about it like this: now I can get a full-ride scholarship, saving me ~$200,000. I studying for about two months for that $200,000. Think about that for a second. I made $100,000 per month of studying. Do you make $100,000/month? Will you ever be given the opportunity to make $100,000/month again? Not likely. (Unless you make partner after going to a top-notch law school!)
Also, a 175 is not as hard to get as it seems. It takes a lot of work, but there's still wiggle room. I bombed an entire logic game and went -6 on LG... and still got a 175. (The wait for scores SUCKED.) If law school is what you want to do, you owe it to yourself to retake.