How long it may take to get an interview date???

[hellraiser 42]

I understand there could be many factors and is dependant on countries, but is there any general rule of thumb for getting an interview date after the case is approved by NVC?

My Country is Bangladesh, and when I called NVC on last week of may (that's when my case was approved), they informed me that the local embassy couldn't find a date for the interview hence they will start for it next month. I don't want to panic but is guessing this will take place in July. The question is, what is the general rule of thumb, or norm when it comes to setting up an appointment? Should I expect that with in the next 1 week, I will get the date in a mail or this may take even couple of months? From the user base of Bangladesh, I've noticed that the general time of getting the appointment is within 2 weeks of the "Case Comoplete" at NVC and then the time is somewhat 30-40 days. Am I just drawing my gungs too early. It was a long wait and this process sucks. I do know that many others are not as privileged as I am and some are suffering really bad, but that does not ease my pain or subside the frustration in any way. I wish there was a massive change on this process!!!!!!!!!! Any suggestion, specially from fellow Bangladeshi would be helpful.