A lot of people retake the LSAT and most only improve, on average, about 1 or 2 points. So unless you were really sick on test day and your score is not indicative of what you usually score, don't waste any more time.
With that being said, are you wiling to lose another year. If you finish at the Top 20% at Loyola, you're golden and in the same position as a T14 student.
Think about it, you can work really hard to improve the a few points on the LSAT score or you can use that same work ethic and kill the first year and be in the same position.
Personally, you can work really hard on studying for the LSAT and not improve by much whereas you can work really hard the first year of law school and will likely do well. Law school is no secret, those who do well work REALLY, REALLY HARD, like psychotic hard to the point of living, breathing, and sleeping on the law will come out on top.
Point is, first year law school is more aceable with a good game plan than the LSAT.