im 27 and i have done 3 hpt which came out negetive.im 17 days late for my period and have all symptoms like nausea,frequuent urination,gas,bloating,diziness,fatigue,fast heartbeat,heartburn,cramps.sore and heavy boobsheadaches,backache,now on the 17th day i have a mild spotting.i really donno wats happening..plz advice something.il be going to the dr soon