Spotting ?

On Saturday I noticed I was having cramps on my stomach & I thought it was from me being hungry from not eating.. lol ! but Later that day I also noticed I spotted some blood.. so I thought my period was coming so I wore a pad.

My period hasn’t started & I haven’t spotted again since then, WHAT COULD THIS BE???? I googled what it could be & it’s been a pretty stressful week with me crying so I figured it was from stressing because it says you can spot from stress but I honestly don’t know what or why this happened. Help?!