In british english you can say, i shocked and stunned. Stunned means that you couldn't move. You were so shockedou didn't know what to do. And the other idiom expression is, i couldn't believe my eyes. That's if you see something shocking and it's like, hat is that real? I couldn't believed my eyes. The next one is about being happy, ok. Now, of course, you can say,. but a more extreme adjective you could use, delighted. I was absolutely delighted. A an informal british English expression for chuffed is  chuffed to bits. In america, they would say, i was pissed