Lol. Look it is not so bad as at least you will have fixed what would have been a bigger problem later on. Just don't poke around unless you are looking for more work to do. It amazes me how people do these things. We have a shower in the outside building that has an outflow pipe down the driveway. I have 3 bathrooms that need redoing and I am not brave like you and will get people in to rip them out one by one. A bathroom is a massive selling point if they are modern and nice so you are adding serious value.