question again, thanks

I upgraded my H1 petition to premium process two weeks ago, and haven't got any news yet. I am so worried that USCIS wouldn't process my case within 15 days. I know there are many case still pending even they requested premium process earlier,like Aug.

My question is whether there is any alternative, like re-file or change of employer, though I don't really know a lot about them.

Thanks again.