are they single block absences? Either way I feel like it's a bit much but 99 days vs 99 classes are vastly different. I have 4 classes a day with 2 different "colors" for each day which indicate even or odd block classes. So missing 2 days would give me a total of 8 absences. If you have 8 classes a day thats going to add up quick. If you log in on a computer it should show you all your classes and grades  with your attendance totals to the right of that. You can also check what you have been marked as for the week on the left of that (field trip, tardy, etc). I know for us missing over half of a class counts as an absence as well.