Aggression question

[DRKEVDC]

I am having a hard time with a certain concept. Lets say that I flop a straight, that at the time is the nuts, I make a bet, get raised and I come over the top of him/her. At this point I am usually all in. If they call and make a boat/flush is that Omaha or am I being too aggressive with more cards to come.

What if this same scenario happens on the turn, do you push with one more card to come and if the person hits their flush/boat to beat your straight you take it on the chin?