I think you are refering to xenical.. and I think it is almost identical to Alli if not the same (I found that after extensive research on the internet.. which may or not be correct). However, from what I understand you may not see any changes at all. I have been on Alli for 10 days and seen no change in my bathroom routin. I do notice...***Graphic***.. that the toilet water looks like someone poured cooking oil in it. But, I don't feel any different.. Don't have to go any more frequent, no cramps, no oily seepage.. you get the picture.
Relax... and count yourself lucky. I stay within my cal and fat recommendations, and most meals I meet them, give or take 1 or 2 fat gram, and my body respects me for it.