I have worried multiple times about vasectomy failing lolAnd honestly hubby and I have sex almost every day so its a sure bet we hit ovulation time every single month.
You have been stressing alot with the school planning etc. It takes a toll sometimes. ANd as you age it will be different. Since I hit 30 things have been crazy in the hormone department. Dont worry to much because as you age things change. (things Im finding out month by month) Doc explained that the hormonal changes will mess with the cycle a lot more than you realize.
Good luck
Chris