I think you were really smart to boil the water first, tap water is safe to drink but can potentially have stuff in it that isn't good for an open wound.
I also agree that from the pictures, it looks like it's not hanging in there by much. At the very least, the barbell is way too long for the piercing. That was one of the reasons I retired my nipple piercings, they were getting closer to the surface and I was terrified they'd come out.
You can get Emu oil here, and that's supposed to be really good at preventing scarring and helps skin heal a ton. I use it whenever I stretch or put in organic jewelry. Otherwise, it's good to do sea salt soaks after you retire a piercing to help everything heal well, but cleaning it daily in the shower is better than nothing.