Hello.. I Am 19 Weeks... Had My Cerclage Placed In

hello.. i am 19 weeks... had my cerclage placed in 16 week as it has showed that my cervical lenght was 2.3 cms.. i want to know that is this ok.. i am a bit concerned as i nevr heard of such thing before.. i wanna know if i hav to rest till 9 months.. are there any complications.. pls advice me doc.. will i hav normal delivry? and also m taking progestrone injections.. i am a bit nervous.