How to get husband to be dominant?

I am a sub/brat through and through and my husband has never really been into bdsm until recently. He's only dominated me once and I seriously cannot stop thinking about it. That was like 2 weeks ago and I want so badly to have sex like that every time but it almost seems that after that one time he's not into it anymore. I'm really confused. I just want so desperately to please him but he never tells me what he wants. Could I have done something wrong?