I am in the exact same situation as you, i have always struggled with bars so much. Kips really aren't my thing either.
That's great they got better at your last practice, and kinda funny cause the exact same thing happened to me at my last practice (Thursday too). Plus I was also supposed to be having a meet tonight...but i sprained my ankle 2 weeks ago and it is still sore and bruised so i can't compete.
Do you have to have a long hang kip in level 5? In ontario we just need one kip in our bar routine so I just do a long pullover cause my long kips are non-existent.
Anyways, good luck at the meet, visualize a perfect low bar kip before you go and I'm sure you will get it. Be confident, don't doubt yourself and try your best on the high bar kip too.
have fun!