Ali- a technique I learned at a professional conference for dealing with conflict with one’s staff (but it works great with kids!)
Have a sit down. Pick out a date on the calendar- October 10th? Gives her a month— and let your D know that on October 15th you, husband, D will have a sit down to review her spreadsheet. That spreadsheet will contain 2, 4, 20 colleges that she’s researched- number is up to her. It will show the stats required to get in (no point wasting time on a college where she is certain to be rejected), the likely cost to your family after accounting for merit/need based aid, and the programs your D is interested in… allied health? early childhood ed? counseling/social work?
Between now and October 15th you get to limit yourself to the following comments on her college choices- “Wow, you’ve done a lot of research” and “Sounds exciting” and “I’m impressed with how much information you and your guidance counselor have been able to dig up”. i.e.-- comments which are perfectly neutral but sound vaguely supportive.
Kick the can down the road. There are over 3,000 colleges in the US, so drawing battle lines over one or two colleges seems like a waste of time right now. Plus- your D hasn’t put in the time to research options besides the two Christian schools she now thinks she doesn’t want to attend. She wants options? Time to get cracking. Kids can check out 40 Yelp reviews before buying a new brand of shampoo… they can certainly do their internet homework on a college!!!
I would also not bet the farm on speech. She’s got a flair for working with kids- fantastic. But since you work in the field, I’m sure you’ve met colleagues who have “jumped the fence”, i.e. started in allied health and ended up as teachers or guidance counselors or social workers (anatomy and physiology? who knows which course will torpedo her interest) and of course, vice versa. So for a kid who is both young, and who you describe as immature and indecisive- I’d bank on her future goals involving kids if that’s her passion, but the educational path for speech vs. social work vs. classroom teaching suggests she’s going to need some time to explore her options.
I’d also encourage you and your husband to have a serious discussion about a gap year. If they are not popular where you are, you may have some misconceptions about them. I moved from a city in the midwest where they were unheard of (unless a kid was in rehab) to a city in the Northeast where they are very common and quite popular. So my view was “only troubled kids take gap years” and now I know dozens of terrific kids, wonderful students who are now happy, working professionals who credit that “extra year” for many things- but most of all, for allowing them to show up at college focused, ready to work hard and get everything out of their education that they could.
There could be a mission program from your church? Volunteer work in the community plus a paid job, language program to gain fluency (especially since she has ESL experience), etc. Doesn’t need to be expensive or fancy to give her time to grow into herself and be less of a “wild card” going off to college. And it gives her another year to learn about herself and be less influenced by other people.