If I am not offered an attroney or read my rights, will I be facing jail time?

It sounds like you are charged with a felony. Assault with a simulated weapon. The issue is not if a person was hurt, but if they were put in fear of injury or death. You can be facing anything from probation to prison time. When arrested the police do not need to offer you an attorney. If you ask for a lawyer the police must stop all questioning. If you did ask for a lawyer, the police probably did not ask you questions and therefore did not read you your rights.