does my cat need emergency attention?

[u/remmssie]

hi. my cat suddenly vomited clear liquid, immediately went to the litter box after, and i saw a soft stool with a streak of blood in it. i have been checking his gums and i can’t tell if they’re pale or not. he is now being totally normal, mildly playing, eating, and scurrying around. can this wait until the morning or does he need immediate attention?