Hello, thank you for writing in to HCM. Light spotting in the first trimester of pregnancy is not very uncommon. But since you had heavy bleeding, the matter becomes of serious concern. Initial few months of pregnancy are very crucial as chances of a miscarriage are high. You ve been advised bed rest so that the embryo s grip gets stronger and such incidences of bleeding do not recur. Utrogestan is nothing but the hormone progesterone which would help strengthen the endometrial lining( uterine wall lining) and cervix strenthening to keep the opening tightly closed. And you re asked to take it vaginally for better and faster absorption. This bed rest is important because of the above reasons mentioned. Even if your work is not strenuous, a little rest wont hurt. Remember its for the good of you and your own baby. Even traveling to work or such physical activity should better be avoided at this point of time. I hope this makes you understand the seriousness of the situation much better. You could always get back to HCM with any further doubts. All the best.