Slow down ma1ma1
... It takes about 1-6 weeks for them to schedule an FP. My RD is around 1-2 weeks before yours and I also haven't received the FP letter. However, its not that I will receive the FP letter before you. You can well receive it before me, depends on the load at your DO and your luck !!! That is correct -- luck is a big thing as every individual is different
and so is every damn computer that schedules FP
In case you do need to call, the number is listed on your 485 receipt. I had to wait for 15 min to talk to front operator and then 20 min to talk to IO. So, have plenty of time at hand when you call and believe me their standard answer will be every applicant or individual is different
Also, I maintain the Excel sheet and do post when there are significant changes to the sheet or once a week, whichever is earlier. So please be patient if the sheet is not available for another 1 week.
Also, I urge new folks to read the earlier comments which will answer most though not all answers. That will benefit everyone.