TIFU by clogging the toilet of the family I babysit for

I’m (19m) currently babysitting my three cousins. It’s 10:30pm and they’re currently sleeping. Anyway, I haven’t pooped in about 3 days and I’ve really had to go since yesterday night but haven’t been able to because of multiple reasons that aren’t related to constipation. After the kids went to sleep at around 9:30 I ate some pasta and the went to the bathroom with only the intention to pee, however, I decided to poop because I have to be here for a few more hours and it’s about a 40 minute drive back home. After one big piece of poop came out I felt a lot more comfortable so I decided that that’s all I need for now and I’ll go later at home if needed. I wiped with toilet paper but needed a little more than I would normally use but I wouldn’t say it was a lot. I flushed but it didn’t go all the way down, I flushed again but it still didn’t go down (I always thought that a poop knife is crazy but now I kinda get it). So I took the toilet brush that’s next to the toilet and tried to break it up a bit, the water turned into a muddy colour and then I flushed again… it still didn’t work, so I put down the toilet seat and went down stairs. It’s now been about half an hour and I went back and flushed again, it finally worked. I am now sitting on their couch waiting for my uncle and his wife to get home. I am absolutely terrified that I clogged the pipes or something or that they’re gonna know it was me.

TL;DR- I was babysitting my cousins and took a massive dump tried flushing a couple times, didn’t work. After a while tried again and it worked but am absolutely and completely terrified that something will happen and they will know.