I would have to agree with rev. You still have a long time to go. Sure, you might have just had a crap quarter but you can definitely learn to do better.
Don't think for one second that it will be 'easier' at a T3 or T4. There are amazingly smart people that cannot get into T1s simply because they have poor LSAT scores, these students would still do awesome at any T1.
Curves are typically much harder at T3/T4 schools- you can actually fail or get a D and you're facing a much harsher curve. If you go in assuming you'll do better because you assume you're smarter than the T4 students, you'll end up with bad grades again because a)it's harder to get higher grades and b)you aren't addressing the fact that the root of the problem is your studying and exam-taking skills.