How do I get my girls to get along?

I have three dogs Issabell 4yr old retriver/lab, Jessabell 3yr old austrilian cattle/beagle, & Claireabell 1yr old chesapeake bay/rottie/lab. They were all raised by me I got them at 8 weeks old. Issy and Jessy have always gotten along and up until reacently they were fine with Claire. In the last two weeks Jessy has become very jealuse of Claire, two nights ago they had a fight Claire goes right for Jessys throat but Claire ends up worse she had a hugh cut on her leg from Jessys nails. Yesterday they went at it again and Claire ended up with a huge hemotoma on her face, there was blood every where just pouring out of Claires face, I'm not sure if it's from Jessys nails or teeth. My vet wasn't in so I went to the closest vet, because I didn't have my checkbook on me and only $50 with me ( I had to bring back a post dated check for the remainder, $63) (I only get paid every other week) he only gave me pain meds, antibotics, & an med to keep her calm. even though there was blood every where in the office, her left cheek looks like she has a softball in it that's all he did. The very first question was "what do you have on you for money to work with before we start treatment". Also he never came close enough to even see what was actually wrong with her, he stayed on one side of the room and Claire, myself and my sister on the other. He said idealy it should be opened and cleaned but because I didn't have enough with me he wouldn't do it. I made an appoiment for Claire to go to her vet Saturday to get her checked out right. But does anyony have any suggestions how to stop this before one ends up seriously hurt. I do know part of the problem is that Jessy has chosen me as her "person" she is very protective of me and doesn't like Claire to be by me(Issy put jessy in her "place" early so jessy don't mess with her). I can't give either one away they are like my childern and it would kill me to give one up. Thanks for any help you can give