What's up with his poop?

My son is 2 weeks old and his most recent poop has freaked me out. It has weird bubbles in it and all of his poops have had these weird like jelly ball things? Idk but it's so weird to me. Maybe it's mucus? I can barely remember what my first baby's poop looked like at this age so everything is scaring me. He has a dr appointment tomorrow and I'm going to bring it up and show him this picture but I was wondering what you all thought? Anyone else's baby ever have this?