Your feelings are real, and you need to deal with them even if others don't understand them. I don't think you did anything wrong, but you did do something that is troubling for no other reason than that it is something that you need to deal with.

What your uncle said was his attempt at trying to be supportive but clearly it wasn't the sort of support you needed, but at the same time I don't think you need someone telling you that what you did was bad. The only bad thing about it is that it you are having difficulty procecessing it and dealing with it.

I agree with what has been said before, sounds like for a first sexual experience the act it's self was good, you just need to come to terms with what happend.

And just my two cents, you didn't do anything wrong, or that you should be ashamed or embarrased by.