ovulation questions...

Ma

First, I started OPKS this is 3rd cycle. 1st 2 cycles my peak was CD 18, this time it was 15..almost missed whoops! Is it normal for ovulation to vary!! Next, I've heard that you are supposed to have happy emotions during ovulation... But I think my raging hormones make me crazy instead!! I'm now going to tell my SO of I'm being emotional, irrational or bitchy it's time to BD ASAP!!! Anyone else get this way????