pregnant or just stress?

B0SSLADI18

my period started a week late. I was expected to start on Dec 15th, never did. started December 21st by Dec 23rd it was completely done, no heavy period like normal just dry. next day I spotted very light,I dont know what to think. I took a test after I was a day late and before I started on the 21st and both negative. am I testing to early, should I even worry if I'm pregnant?please some help here!