Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.
When did she eat the fabric?
When did she last past stool? What color was it and any signs of the fabric?
Any retching, gagging, lip licking or vomiting?
Can she keep the food or at least water down?
Are her gums pink or pale/white? Moist or sticky?
If you press on her belly, does she have any discomfort, tenderness, or tensing?
You noted that she strains until breathless, is she passing anything when she tries?