SHOULD I TEST YET ??

Since November of last year my cycles have been consistently between 27-29 days. Today I am 4 days late for my period. Mostly I feel kinda like what I would still right before getting AF... little bloated, little moody, some back ache. Actually I guess I'm not cramping (usually I have awful cramps). Nothing else really sticking out to me... other than (TMI) my labias were a little itchy/ tender. Should I test or wait it out still?