Swollen penis

Hey mammas. Just wanted to check on something. My baby is 5 weeks old and his penis looked normal this morning. 2 hrs later while I was changing him, I noticed the tip of his penis is swollen. Looks like 3 swollen reddish bubbles (not actual bubbles though). No redness and no diaper rash. He doesn't seem to complain about it. We haven't used anything other than A&D which I am putting since week 2.. any ideas what it could be? We are seeing the pediatrician on friday not sure if we should wait