i am a 25 year old married female. for the past 3 weeks i have been having nausea , bloating , mild headache, lower- back pain , gum bleeding heartburn in the throat and occasional gum bleeding. which i thought were signs of pregnancy. i got my period on Thursday (it was 3 days late) (i have never experienced any pain or effects before after or during my periods in my life. Kindly explain to me whats happening to me.