Hi
I am very sorry.
Is she still on gut meds or has she only had the one-off medication? Please contact your vets if there is no improvement and she needs regular meds.
Some guinea pigs bounce back from GI stasis quickly but in other cases (usually with other underlying issues, whether they have already manifested or not) this can take longer. A few piggies sadly won't make it even with good care.
Please take the time to read the GI stasis care chapter in this guide link here, which you may find helpful.
It also contains a link to a longer stasis experience with a seemingly healthy piggy of mine (Pili Pala 'Butterfly' in Welsh) who thankfully made it through after three days without any gut movement at all and went on to live for another year if with a growing number of issues to nearly 6 years of age. You may find that thread interesting as it seems to come closer to your own case. It is very draining and emotionally exhausting.
Digestive Disorders: Not Eating - Diarrhea - Bloat - GI Stasis (No Gut Movement)
All About Syringe Feeding and Medicating Guinea Pigs with Videos and Pictures
Emergency and Crisis Care as well as Bridging Care until a Vet Appointment
I am thinking of you and your poorly girl and am keeping my fingers firmly crossed.