First Signs?

When all of you moms out there found out you were pregnant, what symptoms were you experiencing to make you take a test? I'm 3 days late so far. I have never been late other than when I took a plan b months and months ago. I'm having some nausea but not actually throwing up. I also feel like I'm having period-like cramps, yet no period. I'm on cycle day 36 and for the past three months, my cycles have been exactly 32 days. I haven't taken any other medications or been stressed. I've been active all throughout my cycle. When should I test? And what made you take a test?