Hello everyone, 33 weeks pregnant with low placenta (5 cm from the inn…

Hello everyone, 33 weeks pregnant with low placenta (5 cm from the inner lip, normal above 6 cm) The doctor prescribed Utrozhestan 200 ml 2 times a day vaginally, there is no bleeding, I feel good ?? My friend told me that her sister took all sorts of pills and before childbirth the cervix didn't open (hardened) Can I not insert it? The term is also not small ? It remains just a little bit.