Shots side effects

angel • 👶🌈🌈👶🤱

Please don't turn this onto antivax vs vax comments. My baby had her first set off shots today ans yesterday morning her formula changed from ready to feed similac to powder alimentum. Today she's only taking 2oz instead of 4 and sleeping a ton( she also has a little head cold) is this normal side effects from the vaccines or should i be concerned. My other kids are way older so i forget. I can rouse her she just doesn't want to stay awake.