Should I take a test?

Cheraya
I am officially 5 days late and I want to be excited because I am trying to get pregnant but I just don't want to be disappointed again. I took a pregnancy test 10 days before I was supposed to start and it was negative.  I wouldn't say my periods are consistent because I was on the depo shot for 3 years where I didn't have a period. 
Help! Don't know how much longer I should wait! ?