I think the amount of detail is sufficient, especially given she isn't really at her right mind, most likely even suffering from opioid withdrawal ("...She longed for the medicine from the epidural to numb her brain. If she could, she would insert it directly into her brain. Anything would do: Heroin. Morphine. Pentobarbitol. ...").

The feel of the carpet-y fibers in her mouth was dead on, and its not like she was able to tell much else.