Hi, I'm Liza From Bangladesh, 25Y Old And My Weight

Hi, I'm Liza from Bangladesh, 25Y old and my weight is 55KG. I had gone through miscarriage three times. I had also suffered from uterus myoma which was removed in December, 2016. Now, I'm pregnant again and observed discharge of blood(small amount) for the last few days. My latest USG report indicates 5 weeks of gestation and follow up after 2-3 weeks for confirmation of viability. I've consulted with my doctor and prescribed me Microgest 200mg, folision tablet and lactulose syrup and suggested me for USG check up for further medication. after 1 week of taking Microgest 200mg, my body started to be very week, blood pressure went very low 90/60 and I was injected saline two times. Since then, I stopped taking microgest and now feeling much better. Is it because of microgest? considering my previous and current condition is it required to take microgest?