Thank you for reaching out to us.
It is halachically permissible to have an
IUD inserted in the days before Tish'a B'Av. Though there is a general preference to avoid potential dangers in this time period, IUD insertion is regarded as a routine and safe procedure, and delaying it can complicate contraceptive efforts.
You should not hesitate to discuss pain relief with your physician, to ensure that you are as comfortable as possible.
To prepare from a halachic perspective, we recommend seeing our site's discussion of IUD insertion,
here.
Please let us know if we can be of further assistance.