It's so hard to guess when your period is due when you have an irregular period! I experienced irregular periods after I weaned my youngest daughter from breastfeeding and it was extremely frustrating to have my periods come randomly.
To get a rough idea of when your period should come use a pregnancy test calculator (I always recommend the one at https://countdowntopregnancy.com) because it has a lot of information and a lot of different dates you can input for more accurate results). I know this is tricky with an irregular period, but it can at least give you an estimate of when you're due.
Since your cycle IS irregular go ahead and take a pregnancy test that way you're not more stressed, sitting around and holding your breath waiting for your period to show up.