Hi Samina,
Please correct me if I'm wrong... What do you mean by police certificate that you didnt received yet? is this the one you will received from AbuDhabi then to be presented to KSA police station for application of police clearance?
If yes, just a suggestion... you can ask the embassy (Philippines) a request letter for KSA police clearance, then use it to obtain KSA police clearance (that's what I did when I submitted by application to AbuDhabi, I inquire several times about the request for police certificate but didnt get a reply from AbuDhabi, then I found another way thru the forums, it took around two months before I received the request letter from AbuDhabi but before that I already sent my application). By the way did they ask to renew NBI as well?
On the other hand, it could be a photo finish, 4 weeks to received the request, 10 days for KSA police clearance and 3 days for express mail.
Congratulations! your on the way...