Please help????

I get my period every 28 days like clockwork. Now, I got my period on Aug.15 last month. I have all pregnancy symptoms like: dizziness,nausea, tenderness,mood swings,I'm always tired,and oh yeah am 5 days late. Now today I started to get some light spotting and always on my first day of period I get it heavy. I don't want to get excited of I'm not actually pregnant. I'm just so confused. PLEASE HELP!!!!!