Baby sleepy after 2nd Covid shot?

Risa

Hi all, I got my second Covid shot yesterday and am currently breastfeeding. My son seems to be excessively sleepy today. He will wake long enough to eat then go right back to sleep. I’ve tried to wake him and he opens his eyes for a moment then back to sleep. Anyone else experience this? Should I keep trying to wake him or let him sleep? Fine otherwise, not fevered or anything