H1B, H4 Visa

Could someone guide me based on the scenario and experience?

Background: Have i-140 approved
Three times had been for visa stamping and successfully got approved (1st time in Canada, 2nd and 3rd time in Chennai)

I live in US and I have my H1B valid until Nov 1st, 2017 (without stamping)

On Aug 27th,2017 my employer applied for H1B extension and amendment(without client letter) because i changed my client and location.

I left to India on Sept 12th due to family emergency.

I went to visa stamping based on old I-797 which is expiring on Nov 1st. My LCA has previous Client details

My h1b extension/amendment has new client name and location

On Sept 20th i had OFC appointment
On Sept 21st - Visa interview

VO asked me few questions like, client name, salary and asked for client letter

I gave all the details of new client name and location but since i didn't had the client letter i gave VO a contract papers between Client and Vendor (Here vendor is the one who was implementing the project at client location)

VO gave 221g blue slip and said that they have to do employment verificaiton and gave the passport back.
Now my case is in administrative processing.

In the mean time, i upgraded my h1b extension to premium processing on Oct 13th.

Now i am not sure what will happen to my H1B extension as i left US while it is on processing.
And i am not sure whether to withdraw my case which has 221g blue slip.

Please someone guide me in this situation.

Thanks in Advance.