Did they ask you to provide any evidence? I heard that once the expedite request is approved, it only takes a few days to get the card... Even without the expedition, based on the processing time other April cases take, I assume yours might come out soon. By all means, good luck!
BTW, maybe you've already known that - you can set an email alert by creating a account on USCIS website. It will automatically send update to you so you don't need to refresh the page thousand times everyday.