How Long Does It Take To Get Record Expunged?

I recently did the paperwork to get my record expunged. I have 4 cases. I did the paperwork at the court and this nice clerk lady helped me out. She said it could take up to 6 weeks to get a court date. I received copies of the paperwork i filed out a few weeks ago but it has already been 6 weeks and i have not received any more papers or court date. Has anybody here gone through the expungement process? Should i go back to the court and ask? I live in California by the way.