First missed period

Okay so don’t think I’m so dumb but just need a little guidance about some stuff I have no one I can really talk about this too so this is my first missed period and it’s only been 3 days should I be worried ? Today’s the 3 rd day and I thought I got my period but it very little and no clots very pinkish light color my boobs have been sore but no cramps ? Should I just wait the rest of the week or or just two weeks to get a test ?