Will my nipples go back to normal? Will they stay like this or will they flatten out? (Photo)

It is too early to tell. It may take several months for the scars to settle. At that point you can re-evaluated the results.

After a breast reduction with a superior pedicle the nipple can tend to invert or bunch up as in your photo. We have not seen the nipple stay that way and you too should expect the skin to flatten and give to look like a normal nipple again. It takes courage so think about something else as you recover.

You're only 8 days after breast lift.  Folding and irregularities of the nipple areola are common at this stage.  In time the folds should straighten out and looked more normal.