I would assume the male has beaten her. how did you determine sex?
keep your water clean, avoid any temperature shocks.
continue with the Furan - 2 until you have finished the prescribed doseage.
also monitor your Ammonia, Nitrite and Nitrate levels just incase you get a mini cycle due to the use of anti bacterials.
stop using liquid fryfood, and give her something like live mozzie larvae, white worms or a good quality pellet food. the fryfood will not be nourishing her enough.
find a way to monitor the temperature as the aim is to keep everything stable atm
other than that, just wait and monitor.
hate to say it but you may lose her, she sound pretty beaten up
good luck