Emma - so sorry I missed this before - I'm so glad Indie is feeling better. It's easy to panic - but if ever she is sick like this just try to stop and think what has happened in the few hours before that might be the cause.
Eating fur - the boys do that given half the chance and yes it will make them sick - idiots!
Drinking bath water - yup that too is likely to make them icky. Being in season- just like us each bitch is different. You need to remember this for her next season and see if there are any similarities so you know what to expect next time. Then if there is anything our of the ordinary that you can't link to anything else - press the panic button
Only joking - but by eliminating elements you either find your cause or confirm what you need to do, if anything.
The biggest thing though when a dog is sick is again just like us - it can just happen and be a one off and in no time they'll be back to normal. If it continues or is accompanied by other symptoms then you might need to get the vet to have a look. ALso rememebr how they pick up on our reactions. Indie will see/sense that you are scared and this willupset her more - so you need to try and stay calm, it will reallyhelp the overall situation not least you!
I really hope that didn't come across as preaching - it's not meant to be - I just hope ithelps
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