I need help with my splits!?

Okay so for the last few days I have been killing myself trying to get my splits and it is not working. Im doing them one at a time: Right side then left side. My nightly rutine is to take a really hot shower and relax my muscles. It works really well and I can go to about 5 inches off the ground where I was at a foot off the ground. But Whenever I try them before my shower I spring up another 2 inches and last night after taking a hot shower my legs just wouldn't budge and I was back up to a foot. It hurt a lot worst too. So whats going on? What can I do to get my splits? I kinda need them before sunday/monday. Atleast the right one