informal

Also, is it likely that any more chapters would do it this semester or will i probably have to wait for fall

1.) Chapters will either reach out to girls they have in mind or they will have open informal. It really depends on how many girls they need. You might want to reach out to each chapter and see if they're doing it/keep you in mind.
2.)It really depends based on which chapter you choose and how many spots they need to fill.
3.) No it doesn't diminish your chances. I can only speak for my sorority on this topic, but at no point did we ever take into consideration whether or not you did informal.
4.) Yes you still get a big/go though new member period. It's just you have a smaller pledge class.
5.) most likely wait for the fall

I think some chapters may have done informal already. Or at least gave some bids after recruitment. That was probably invite only, in which case you wouldn't know about it unless the chapter invited you to participate in it. I would say most informal recruitment is done by invite only and the girls invited are usually referred to by chapter women who think they would make a good fit. Anyway if you wanna know who is doing it, I would reach out to panhel and follow all sororities on social media where they make announcements like that. And I don't think doing informal affects formal recruitment in terms of being cut from chapters.