Help I don’t know if I’m pregnant

Sarah

OK I am eight days late on my period I have really sore boobs I constantly have a headache and I feel really sick most times will be known as nauseous but I haven’t thrown up I’m really tired and I don’t know if I should take a pregnancy test or wait somebody please help me because I’ll be a first time mom and I don’t know what I’m looking for Any help would be greatly appreciated