I had a big toe injury about 2 weeks ago causing toe to buckle by the foot joint?

Huckle Buckle..: If indeed the toe is now buckling where as before the injury it wasn't, then it's time for a trip to the specialist for a evaluation. There could be multiple reasons for the change, including bone, tendon, capsular and ligamentous damage. Waiting too long for treatment could lead to permanent structural deformity or even worse, a functional problem.

Whats the issue: now? were X-rays taken? if not I recommend them.