Don't feel pressured to bond with your pledge class now. It's not a "now or never" kind of thing. Focus on getting the help you need, and keeping supportive friends close. When you're ready, you'll find your niche in the chapter.
I don't know AGD specific membership policies, but my sorority allows members to take a one semester leave of absence during their time as a collegian (you'd be taking classes but not paying dues nor have the obligations that semester) , and a circumstance like yours would definitely be a valid reason for doing so. If you have to take a semester off school, you'll probably be granted alumna status (provided you're in good standing financially) and can be reinstated as a collegian upon return. Ask your chapter advisor about AGD's policies if you are considering either of those options.
Oh, and nice username
