What are her vitals? Does she have a fever? When I teach equine first-aid classes, we hammer home taking a full set of vitals before calling a vet so they have some perspective. Having a fever could indicate an infection which would require much more urgent attention. Capillary refill and skin turgor testing can give you an idea of hydration and circulation, respirations can be indicative of pain. I'm really glad to hear she's doing better! Might be a good idea to just take a set of vitals weekly on your girls in foal just to monitor to make sure they're healthy and as supported as possible.
Best wishes for happy, healthy foals and easy deliveries on your girls. I can't wait to see baby pictures (when they're at full term of course.)