What is wrong with my juniper bonsai?

I've had a juniper bonsai for 8 years now. It was given to me by a very dear friend and it's always been a vibrant green. It's survived every winter and I've never moved it until a few months ago when I decided to re-do my garden. The soil in my garden was always terrible until my last job allowed me to buy some flowerbed mix, fertilizer and of course, flowers. I thought it only made sense to dig all the lousy clay-ridden/ grub worm overloaded soil out. I was worried if I was doing the right thing in digging my juniper bonsai out and putting it in a pot temporarily so I could get my garden ready for all the new stuff. When I put my juniper bonsai back in the ground, it was doing fine until I saw that I planted it wrong because it was tilted somehow. So I dug oit back up and I re-positioned it like it was and then weeks later, I saw that the tiny leaves, I guess started to turn brown. I really didn't think anything of it, but as days went by, it progressively kept getting brown. Now the entire thing is almost completely brown. I've tried clipping some of the brown off and I've made sure it has enough water. If I lose this bonasi because of my mistake of digging it out and probably damaging alot of the roots, I'm going to be heartbroken. I hope someone can give me some advice on what to do because I'm at a loss.