Yep, lidocaine, which unfortunately everyone reacts differently to. Plus there are some locations in the vulva/vaginal canal that practitioners do not want to inject with lidocaine for risk of permanently killing the nerves. So you may or may not feel stitches. I felt all of mine with my first as mine were actually inside the vulva and vaginal canal and I don't respond much to lidocaine. But I already knew that I didn't respond to lidocaine from a previous injury, so I was somewhat prepared. And the good news is, with minor tearing it's usually a pretty quick process and you can be staring at your newborn while they're doing it, hopefully distracting yourself.
As for pooping, I had that same fear! I had heard horror stories about it and decided that I was just going to get it over with- I still had a lot of that "power through" mentality from the high of the birth. So I powered through and for me, it wasn't painful at all. But I also only tore in the vaginal area, not anywhere near my anus. Peeing did sting just slightly, but that's what the irri-bottle is for. Just make sure to have that full of water near the toilet, squirt it on yourself while peeing and no problem! Often care providers will wait for you to pee before they leave. I highly recommend doing it in the shower as it will likely hurt less b/c of the water pouring over the area and you don't have someone watching over you while you're trying to pee!