6 month shots

My baby girl got her 6 month shots yesterday and her flu shot. She was completely fine yesterday evening . Today she seems extra fussy, sleepy, and just wants to nurse a lot. She didn’t do that last time she got her shots. She has no fever but she’s not herself at all. But she does have a runny nose so maybe she’s getting sick as well. My son has a runny nose so she could be getting that at the same time. I’m just a little worried. Or maybe teething too? Idk. What were your babies reactions?