missed period after Laparoscopy

Kerrie
Hello guys
Just wondering if anybody has experienced a late/no period after their Lap? 
I had the operation in the 19th September (6 weeks ago) which was the day I would have ovulated. I had a normal period a day early on the 2nd October (2 weeks after operation) I use the clear blue fertility monitor and only had "highs" the month of October no Peaks, and my next period was due on the 30th October (2 days ago) 
I've done a preg text which was negative.