One of the most important things you can do is to educate yourself regarding the group she has associated with. Answer these questions to your satisfaction - What does the college and the church teach? Is it based on the Bible, or is it based on a particular person or group of people? What is their background? Attend their services - not just Sunday morning. Attend their activities, if possible. Ask questions. If you get resistance, ask more questions.
Finally, make sure your daughter is reminded early and often in tangible ways that you love her. We humans can tell if we're being lied to. Truth always wins out. If you love her, show her - and it will make a difference. Let me know how it goes, or if I can help in any way.