I am confused..please help.?

Ok..i got my last period January 1st. That cycle happened to be 34 days..which is the longest i have had. Usually i am 30 to 31. Anyway, i use the ovulation tester and today i used my last one and i never got the happy face?? Today is now 21 days past my period. Even with that length of a cycle shouldn't i have ovulated already or gotten my surge? I am taking prenatals and have been using first morning urine..could this mess up the test at all? On thenest.com my suspected ovulation week is the 18th, and i should have ovulated on the 21st. That was yesterday..what should i do? Get more tests just incase?