Hi LilJoRt6,
It's true, it would be necessary to know a few things before diagnosing your problem.
If you look at the negatives, are they clear with no tone variations - all the way to the edges of the sprocket holes? If so, then it would appear that the shutter didn't open.
If there are shadows at all on the negatives - then they might all be under-exposed - you didn't have enough light - and the lab's automatic equipment bypassed them.
When you say they didn't come out, it could mean lots of things - like nothing was recorded on the film - or they were just "bad"... - blurry, etc, and the lab didn't print them.
So, though the other response was not very nice - I guess he's making the point that unless you can show us or describe to us more about the negatives or pictures (if any were printed), it's impossible to say.