Here's an example - my hair has been almost exactly as shown in this picture for 8 years (this picture is from last month just before turning 31). I had some definite concern when - at 23 - I noticed that seemingly all of a sudden my hairline wasn't quite what it was at 18. Given that you're posting on here, you're clearly more in worry mode than I was. I would advise you that, for your mental well-being, don't go down the road of obsession that I have. You have two choices... One is to see if you remain stable and then in 5-7 years perhaps be aggressive and go from NW 2 to a stronger NW 2 with surgery. The other is to be (IMO) reckless and try to go from a NW 2 now to a stronger NW 2 now. If you do and you stay stable, you end up with years worth of being a better NW 2 under your belt (though that's arguably not going to really impact your life much). If you do and you have considerable loss, you're in disaster territory because you lowered an already solid hairline at age 24 and then are chasing to keep up with your loss. I think the other posters (I'd imagine all of whom have more experience looking at hair loss than I do) are correct to write you words of caution.