A judicial officer has to make a probable cause finding in order to impose conditions (such as bail) of release. That is not the same as the case being dismissed since the materials submitted to a judicial officer for a probable cause determination is not necessarily all of the evidence in the case. The court, furthermore, should allow both parties to argue whether there is a prima facie case rather than dismiss a case on their own motion. Sometimes the information in front of a judge for a probable cause determination is missing some relevant fact that would result in a probable cause finding.
A determination of whether there is probable cause must be made in order to hold you in jail. If there is no affidavit of probable cause filed or the affidavit is insufficent, you must be released. An affidavit of probable cause can later be filed involving the same incident/charge or any problems in the affidavit can be corrected. You need to go to court or you will risk having a warrant issue for your arrest. Retain an attorney or request a public defender if you cannot afford an attorney. Your attorney can review the probable cause affidavit and determine whether it is now sufficient or not and can make objections or arguments as need be.