The suspected drugs and paraphernalia will be sent to the Johnson County Crime Lab. There they will be put through the GC-Mass Spec machine to determine if there is anything illegal and if so what. The report will come back to the officer who will submitt the report to the prosecutor along with his report of finding the stuff. The prosecutor will then decide what, if anything, to file. Assuming he decides to file charges he will then decide whether to request a warrant for your arrest or send you a summons. If it was a city cop the reports will almost certainly go to the city prosecutor, if it was a highway patrolman or sherrif's deputy it will go to the district attorney.
If you have no prior convictions for similar activities you are probably looking at two or three Class A misdemeanors. Each is punishable by up to one year in the county jail and/or a fine of up to $2,500. If you have priors you might be looking at felony charges. Either way you need the assistance of an experienced criminal defense lawyer who handles a lot of drug cases.
Legal disclaimer: Legal disclaimer: Patrick M. Lewis, (913) 558-3961, firstname.lastname@example.org. This answer is intended to provide general information about the justice system. It does not provide legal advice nor does it create an attorney-client relationship. It does not provide the basis for making decisions about a course of action. Legal advice requires more communication and information than is possible in this format. Many important considerations and factors need to be investigated and discussed before an attorney could give legal advice about this issue. Before making any decisions about a course of action readers are strongly encouraged to contact a lawyer and secure an attorney-client relationship. Readers must also understand that this format does not provide for confidential communication.