Being attentive is great. Keep an eye on her. If she doesn't kindle tonight or tomorrow she very well may dig out/mess up her nest showing it was a false pregnancy. Hope she surprises you and if not thinking the buck may not have followed through, I always blame me 1st (I double check records and husbandry), if all is good 2nd blame the buck (too young/too old/too heavy/too light/can't finish properly/infertility), then if bucks proven by ME the doe is checked for issues if we are having an issue breeding.
Make sure she has Plenty of water, few fresh herbs if she wants, my does really don't eat much the last few days before kindle then they pig out after. I have to research a doe in labor distress, I'd would think it'd be noticeable but will try and get info in case its not. Sorry hit or miss WiFi at work may take a few