On 1feB I had been with my partner.. it was hardly 1-2 min of it.. then on 2 jan at night i took unwanted 72. Then on 16 feb had my periods like bleeding..then around 2/3 march my health started deteroiting.. i felt very low and had symptoms similar to pregnancy like fullness body aches burping fatigue metallic mouth taste and in the mornings i have to clear my throat .. i was doubtful then i took 2-3 home test.. all came negative.. then after a week also it was negative..im taking acidity med but still doubtful and its scaring me all the time .. why is all this happening??