No clue what to think

Patricia
So last cycle I thought I was pregnant because my period was late. I was going to wait until a full week before I tested. Although my period is ALWAYS on time is was about 5 days late and unlike my usual periods the serious cramping only happened about half of the first day. 
Well anyway currently I am 4 days late for this cycle....should I wait a full week or just test today? Funny thing is that we didn't do ANY TTCing this cycle so if I am pregnant then it's actually from the last cycle. Ahhhh I'm going crazy!!!