Hi laura,
This is a question I too have pondered. And as yet I don't know if I'm chosen either. I found some interesting insight in Paul's writings. It seems that he didn't know of his election until the coming to the end of his life.
Notice what he says in the following verses:
Phi 3:8 Yea, doubtless! and I account all things to be, loss, because of the excellency of the knowledge of Christ Jesus my Lord, for the sake of whom, the loss, of all things, have I suffered, and do account them refuse, in order that, Christ, I may win,
Phi 3:9 And be found in him—not having a righteousness of my own, that which is by law, but that which is through faith in Christ, the righteousness which is, of God, upon my faith,—
Phi 3:10 To get to know him, and the power of his resurrection and fellowship of his sufferings, becoming conformed unto his death,—
Phi 3:11 If by any means I may advance to the earlier resurrection, which is from among the dead:
Phi 3:12 Not that I have, already, received, or have, already, reached perfection, but I am pressing on—if I may even lay hold of that for which I have also been laid hold of by Christ Jesus:—
Phi 3:13 Brethren! I, as to myself, reckon that I have, not yet, laid hold; one thing, however,—the things behind, forgetting, and, unto the things before, eagerly reaching out,
Phi 3:14 With the goal in view, I press on for the prize of the upward calling of God in Christ Jesus.
Now notice in 2Tim which was the last of Paul's writings shortly before his martyrdom. Paul seems to have assurance of his election before the end of his earthly life.
2Ti 4:6 For, I, already, am being poured out as a drink-offering, and, the season of my release, is at hand,—
2Ti 4:7 The noble contest, have I contested, the race, have I finished, the faith, have I kept:
2Ti 4:8 Henceforth, lieth by for me—the crown, of righteousness, which the Lord will render unto me in that, day,—The righteous judge,—Ye, not alone unto me, but unto all them also who have loved his forthshining.
And I found it interesting that in the parable of the talents that the faithful servents were granted entry into the joy of the Lord.
Mat 25:21 His lord said unto him, Well done, thou good and faithful servant: thou hast been faithful over a few things, I will make thee ruler over many things: enter thou into the joy of thy lord.
And also in revelation we see this:
Rev 17:14 These shall make war with the Lamb, and the Lamb shall overcome them: for he is Lord of lords, and King of kings: and they that are with him are called, and chosen, and faithful.
I can now understand why I cannot know now if I'm one of the elect/chosen because only at the end of my earthly life will I be able to see if I've been faithful.
Hope this helps
Andy