When should I test?!

Lexi • My name is Lexi and I am married to an amazing man and we have a gorgeous baby boy and a sweet baby on the way!??
My period was due to come on Christmas Day and I still haven't had any signs of it. I've been feeling kinda icky but nothing like I did when I was pregnant with my first I know pregnancy a can each be different but I'm having a hard to deciding if I should test or wait. I just don't want to see a negative, it would be so upsetting. So when should I test? Thanks ahead of time yall!?