Check the school psych's qualifications. Many are BCBAs (certified behavior analysts), especially the more recent grads. And if not, there may be a BCBA on staff somewhere in the system. Also, all SPs have training in FBA, unless they are really old, or didn't graduate from a NASP- or APA-approved program. So you may find that your school does have behavior resources.

And whether or not school personnel are qualified to make medical Dxs, most school systems will not allow them to do so. (Many LicSWs are, as are psychs in some states, at least for mental health Dx, which is mostly what we are talking about here.)

...pronounced like the long vowel and first letter of the alphabet...