My sis is at 32 days and she is likewise getting bored - but since she can't do it while working, she figures this is a good opportunity for her to do it as she is not working this month. They say don't stop while feeling bad symptoms; the cleansing will get you through the healing crisis, so it's better to end on a high. It's probably good psychologically as well so you feel good about the cleanse. At this point it's totally up to you.
I was considering stopping early and I was getting tired of it but now I'm doing ok and I think I'll go ahead for 21 days. I don't feel like I want to push more than that, plus I got humaworm so after I'm fully eating I'll do a parasite cleanse. So for me the cleansing continues! There's no set rule, just make sure you feel good about it and break properly. Happy cleansing!