I think I regret the Sorority I chose...

[APhiAnna]

Stick out until close to initiation. But, if you do still feel uncomfortable...
1. Get a gauge on your campuses chances for rushing as a sophomore. If sophomores routinely get bids to even the most competitive chapters then there is a strong chance you can get a bid next year. If not, this may be your only shot to be in a chapter.
2. Realize that this may cast you as "damaged goods" for some chapters...but the opposite also may be true. If your sorority, ABC, is rivals with XYZ, they may love the opportunity of pledging the sister of two members of their rival. So they may view you as a novelty more than a potential sister.
3. What were your choices at pref? Did you get chapters you would have been happy with? While there is absolutely NO guarantee that you would have even gotten a bid to these chapters, if you got the majority of your top choices during rush and the majority of those chapters will take sophomores, then you have a shot at them (once again, not guaranteed). If you didn't get them or did but they are reliable for not taking any sophomores, your current chapter might be your best bet.
4. TALK to your sisters! They may have even gone through a similar phase as you, especially the middle one. Even if not I think it would make the whole thing easier for you...if you have a good relationship with them that is

[33girl]

Originally Posted by APhiAnna

4. TALK to your sisters! They may have even gone through a similar phase as you, especially the middle one. Even if not I think it would make the whole thing easier for you...if you have a good relationship with them that is

Yes. This. One of my pledgesisters was in your exact situation - 2 sisters in the chapter before her. She was very different than they were (as was the chapter by the time she got in it) and she def had some of the same feelings you are having. It all worked out, though, and she laughed at herself for ever thinking she wanted to be in a different group. Just give it some time.