How to avoid miscarriage? 79 bpm at 6 weeks

help lng po. . ayko na sana mawalan ult ng baby . im hoping and praying na healthy po ang baby namin ngayon.. i have vaginal spotting and threatened abortion dw as per my Ob .. our baby's heart beat is 79 bpm. . anything i need to do para mag progress into healthy c baby and tumaas ung heart beat nya while growing?