Oh no, hope I'm not checking in after you have left! Calm down and take a deep breath, get a childs digital thermonator and put vaseline on it and take the foals temp rectally, check her gums for paleness and check for rapid breathing. Then call the vet and tell them everything, about the mucus, blood, temp, respiration and gum color.See if they can come to your place, it is well worth the emergency call, but if not, yes you can haul in your trailer, bed it down heavily with straw and leave mom and baby loose so baby can lay down if necessary and mom can balance. Good luck, sending prayers, and well wishes, and please let us know how it goes. Don't forget to take those deep breaths!