If you gave Safeguard for 5 days in a row, there is no need to repeat.
I'm glad her poop is starting to firm up, this is promising news!
Shorter winter hours/less daylight, parasites, diet, stress, age, molt, etc. etc., can affect production. Hopefully once the days start getting longer and...
Photos of poop now?
What did you deworm her with?
When was her last egg?
The buttermilk made her poop more, but was it firmer or the same? Buttermilk will provide probiotics to help offset all the treatments you gave her. The rice is to help firm up poop.
If she's acting fine...