I have C7 facet fractures with pars after scan was fitted with miami brace that was 9 weeks ago will I be ok?

Probably. Nondisplaced facet/pars fractures usually can be successfully treated in a rigid brace like a miami j collar. Only someone who has examined you and looked at your imaging can definitively answer this.
Yes. This is usually a stable fracture. You should have x-rays every 3-6 weeks until it heals. I would also recommend a ct scan after 3-4 months.
C7 fracture. Most likely, but increased risk arthritis. Also better prognosis if there are no nerve deficits.