Late Late Late and don't want to Jinx it!

Okay so we've been ttc for almost a year now with our 3rd. our first was born into heaven, our rainbow baby is almost four so we thought it was time. well my period, which is always on time, is 3 days late. I don't want to Jinx anything but I'm really excited. do you guys think it's too soon to take a test? -NervousNelly