At my last check up, I forgot to tell the doctor about rib fracture. Is that ok?

No it is not. This rib frature from truma, could cause lung problems, you should tell him please.Thanks.
Depends. Is it an old fracture or a newer one? How do you know you have one? If its an older fracture, it should be ok. If its a newer one, you should mention it to your doctor.