I'm late.... HELP HELP HELP!!! PLS LOL

Ok I nvr get my period twice in a month nd last month I did... this month I got it once nd I was suppose to get it sat nd till this day nothin I'm late 3days... I haven't done a pregnancy test I'm scared lol... I been tryin since Oct of last yr nd if I am this month is my husbands bday nd that would be the best gift ever... Has anyone have had this problem nd wat should I do or expect?

Also I been havin some dizziness nausea hot flashes hunger so idk.... I didn't have these symptoms wit my first pregnancy.. yet every pregnancy is different rite lol