Happy thoughts needed!!

erin
So, Hubby just got back from a deployment a few weeks ago. We have been doing it regularly (at least every other day) but my periods have been wacky [last period was April 11-16] so I have no idea about ovulation and wasn't going to stress with tracking just yet. 
The past couple of weeks I've been having a sore throat + runny nose, mild cramping almost every day, and been pretty tired. 
My question.. If I don't know when I ovulated or will ovulate, when the heck should I test??
Happy stories pleasseeeee ;) xo