I am really sorry that you are having this problem with Ellie. In response to your question, do not give Ibuprofen it will make things worst. When we see vomiting with blood in the stool this can be caused by many different medical conditions. It will be difficult for me to determine the exact underlying cause without a hands-on examination and some testing, I am sorry. But, common causes are ingestion of a foreign body, infections, or even part of a systemic disease to name a few causes. I am a bit concern about her gums being white, this could be a sign of anemia, severe dehydration, blood shifting to other organs, etc. Dogs with pale or white gums that go untreated by a veterinarian could have a fatal outcome. For this reason, I would strongly recommend having her checked by a veterinarian for a hands-on examination as soon as you can. If you have access to ER vet I would have her checked tonight. I realize that this answer may not be entirely to your liking, and I regret being the bearer of information that you really don’t want to hear. But it would be unfair to you and unprofessional of me were I to provide you with anything less than truthful and honest information. I hope you understand. If you do not have access to ER vet this is what you can do until she is seen by your family veterinarian in the morning:
1- Do not give things like Pepto Bismol or Imodium. Start her on Pepcid AC (famotidine) 10mg 1/8th of a tablet every 12 hours. You can buy Pepcid AC over the counter in any pharmacy.
2- No food or water for 2-3 hours. Need to give her gastrointestinal tract time to rest.
3- After 2-3 hours offer a small amount of water. Wait half hour, if no vomiting, continue giving her water every hour or so. Leave her without food for 8-12 hours then offer a small amount of rice (50%) and boiled boneless chicken or ground beef (50%) 4-6 times a day.
4- Follow up with your family veterinarian for a hands on examination in the morning. If cost is a concerned look into your local ASPCA or Shelter where they often offer veterinary services at a lower cost.
My goal is to provide you with excellent service - I hope I've provided the information you were seeking, if you feel you have received anything less, please reply back as I am happy to address follow-up questions. Kindly rate me when you are done.