The more you do that the worse the sides will be when they do come. It's only a matter of time before your body quits on you and won't fight off all the estrogen you're pouring into it. And all of sudden you'll get bloated and your nipples will start to hurt and you'll get lumps underneath them. And it will be much harder to deal with because it's harder once it starts than it is to prevent it in the first place.
Don't think because you didn't get E sides once that your bullet proof. Aint gonna happen. Your body will wear out.