Good thing you didn't complete the split.
My wife took a similar slip on her soggy deck at her apartment. She did a complete split, a less than limber 40ish woman shouldn't be doing splits. She felt some pain in that leg for awhile, got it check out, must just be some kind of pulled muscle. She went to the doctors another time saying it was getting hard to walk. Of course, they get a lot of drug seekers up here, so she wasn't taken seriously.
One night her pain was very bad and her leg was swelled a bit. I took her to the ER, blood clot in her leg. She had to get on a med regiment for that until it dissolved.