My toe is still black ten days after displaced fracture. Is there any chance of vascular compromise? Also, feels like my foot is being crushed.

Depends on. degree of displacement and degree of crush injury to soft tissue. Get to an orthopedic surgeon for definitive treatment. Soft tissue loss, especially skin, of foot is a serious impairment.
Unlikely. Displaced phalangeal fracture bleeds into the tissue quite a bit. crush feeling is likely pressure phenomenon from internal splint effect of swelling. Keep it elevated about six inches above your heart level.