How can I get my GSD to stop running away and chasing deer?

I also have a GSD and have a terrible time with recall. This is going to sound stupid, but our trainer told us that when we see her about to go to start running in the opposite direction screaming her name kind of panicky. I thought it sounded so weird, but we've done it with our dog and it ACTUALLY works! I feel stupid doing it, but she gets so worried that she comes running right behind me. He said the whole idea behind it is to make the dog feel like it needs you instead of you needing it. Anyway, hope things get better. I think it's really good you're not giving up on her! Good luck!