FORT WAYNE, Ind. (WANE) – A woman could have died from a Fentanyl overdose at the Allen County Jail had she not admitted to medics that she’d hidden the substance in a body cavity.

Stephanie Caron Perrin, 31, a jail inmate, was charged Monday with felony possession of a narcotic drug and trafficking with an inmate with a controlled substance. Perrin has a court hearing Thursday.

The Allen County Sheriff’s Department was called to the jail around 10:30 a.m. Saturday and found Perrin in the jail’s sally port receiving medical assistance, court documents said.

Perrin admitted to medics that she’d hidden the drugs in her vagina, court documents said.

Jail staff found a white and brown “hard, rock-like substance” and used black nylon gloves, after which the drug was placed in a clear plastic bag. The bag weighed 28 grams and tested for Fentanyl, court documents said.

Experts have estimated that a fatal dose of Fentanyl is around 2 milligrams.

Perrin’s cell mate also overdosed the same morning. Barbara Ann Evans, 54, was charged Monday with narcotic drug possession, specifically Fentanyl, court documents said.

Jail staff found pieces of the rock-like substance on Evans’ bunk where she was sleeping and another piece at the back and in the front of her bunk.

The sheriff’s department said Evans denied bringing the drug in to the jail with her.

Most likely, the drug came in with Perrin, who appeared in court Friday on a probation violation, court documents showed.