If you feel unprepared and not ready then you should consider taking it in October or December instead. The LSAT is an exam you need to be ready for and being confident plays a big part in it - and confidence comes with lots of practice and good results.
You definitely need to take care of your kid first of all. LSAT can wait. You need to have peace of mind and confidence to get a good score. I withdrew in February and forfeited the fee, but I don't regret it.
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I second everything ikethelsat just said. Keep working, keep focusing on your mistakes and seeing where you can improve. Stay positive too! Your scores are extremely good, and you should have a lot of confidence going into test day!