I'm not sure I understand the situation. If you made the vow before you became Orthodox, and are now Orthodox, then I don't see why it should matter. I mean, before I converted to Orthodoxy I was Roman Catholic, and so I lived according to that church's rules and practices, but obviously now that I am Orthodox I don't do that anymore. It doesn't mean that I didn't do so then, or that I should continue to do so now, since obviously the way of life is very different between the two.
I don't know anything about making such vows in any case (I'm not aware of having to make them in front of any church authority; celibacy is rather what is expected of everyone who is not married, whether they've made a personal vow or not), but I would have a very hard time imagining a circumstance in which vows made before entering the Church are still required to be held to by the believer after their entrance into the Church, with the exception of those which are also legally binding, like marriage (e.g., a situation wherein one spouse converts but the other doesn't; it's not ideal, but it does happen, and in those cases the priority seems to be making sure that any children are raised Orthodox, and of course inviting the non-Orthodox spouse to the Church, should they be open to it).