Missing Period...

Alyssa

UPDATE:

I'm now 14 days late and still no period, no positive tests, but feeling weird. Idk what's going on, any advice?

I've been tracking my cycle since July for ttc and my period has always been on time if not days early and now I'm 4 days late. Is it too early to test? I've taken 1 today and it was negative. Any ideas on other causes if it's not pregnancy?