Progesterone soft gelatin is it safe?any side effects?

Patient: Hai… iam 18 weeks pregnant now, last week iam realized little amount blood coming out from my vagina, immediately I consult with my doctor, she said everything is fine and prescribed progesterone soft gelatin capsules 200mgX2 morning and night via vagina (4 per day) and will be continued up to 32 week. so that i’m going to use 896 capsules… I want to know any side effects will happen for me and my baby. please suggest me….