Please read the information in the following links:
https://harbornemedical.co.uk/health-and-wellbeing-at-harborne-medical/womens-health/coil-clinic
https://patient.info/sexual-health/long-acting-reversible-contraceptives-larc/intrauterine-contraceptive-device
https://patient.info/sexual-health/long-acting-reversible-contraceptives-larc/intrauterine-system
You may also wish to view this video which provides information about after a coil is fitted:
https://youtu.be/TTrhmM05mng