Should I or should I not?

So my period is super irregular. My first period in six months came back in April then a week later after the last day of that period I started my period again. I have three apps to track my cycles because this one is based on 21 cycle days or more which the average for mine is 14. And according to these other apps I'm 4 days late. I am trying to conceive but don't want to be disappointed with the results due to my irregular period. Has anyone else had this issue as well? 
My overall question is should I wait for my next period knowing its irregular or should I take a pregnancy test