On a carnivore diet I have very little waste headed for the exit, so sometimes I don't go for two weeks. Which leaves things in there quite too long. I find that senna helps, in combination with probiotics, to keep things moving when I feel it's high time.
That said...
My diet, like I said, produces very little waste. If you're eating veg and the like though, that bulks up and it really does need somewhere to go. Things can get painful, bloody, and very distressing. So rather than going with the home remedies, get in touch with your GP. You don't want to end up in hospital, and your plumbing will thank you for intervening now rather than letting it get to a head.