So I told my son he's going to be a big brother...

India
Yesterday I had my first ultrasound and brought my son with me so both my husband and I could announce it to him that he was going to be a big brother. Well, let me tell you, he was NOT happy. As a matter of fact, he shit down completely and didn't speak to me the whole ride home(1 hr). At this point I feel like crap because I thought I was presenting this to him in a way that he could understand (he's 5), but now I just feel like I have taken his world and crushed it down to nothing. I'm actually feeling guilty. He's the sweetest boy in the world and I feel like I have taken the sparkle out of his eye. What advice can you guys give me?? If any?? I can take it. Lay it on me. ((Damn hormones))