No it doesn't sound weird at all!!
I think you should try buying yourself a really cheap microphone, and whenever you sing, practise with it. Even if it's not turned on - just to give you the feel of holding a microphone.
When you say 'you looked dead' (or something similar) do you mean that you were just standing there, and not moving? If this is the case; again, practise with a microphone whenever you sing, and try watching famous people singing - maybe try out some of their movements.
However I do stress, if you don't feel like moving when you hold a microphone - don't just move for the sake of it, otherwise it'll look fake. This is why practising moving on stage with a mic will help.
To be honest with you, I'm the complete opposite to you - so we can relate!!! I don't move at all when I sing without a mic!! When I have the mic in my hand, I feel safe and can move easier....but everyone's different!
Good luck with the mic - and don't worry about it; with a little practise with a mic I'm pretty sure you'll feel more comfortable.
Hope I was of any help
Love Laura
XxX