OCP has two way to give certificate:
1. For Developer and 2. For DBA.
The two ways has some difference from each other. Oracle DBA means, Database Administrator and this part is not required so many knowledge of writing codes and develop forms/reports. though u have knowledge to write query, trigger and some part of pl/sql. and u may know very well that.
Developer parts entirely involved code writing thru forms/reports or pl/sql i.e. deep knowledge of writing codes and develop customised softwares. It is not involved in DBA. This my view, though u have a good knowledge in pl/sql writing as weel as u have done DBA, so u may proceed for Database Administrator and if possible u may do Warehousing also. It takes ur career high. But all is depend on u.
Good Luck !