Females will always have unripe eggs in them once mature. They will either drop and eat or not or reabsorbed the unripe eggs on a regular basis.
It is not uncommon for their poop to change when they either eat or reabsorb their eggs. The fecal matter will take on a white/creamy look for a few days and should resolve on its own-not to be confused with parasites and treated needlessly.
As she fills with eggs and/or the eggs start to ripen-she may or may not take on a head down tail up swimming position.
Once the female detects the male her eggs will ripen and she will emit pheromones alerting the male she is ready to spawn.
Lovely Betta by the way....how is she doing today...any changes...