Could I be pregnant?

So my period was very regular before ever starting birth control. I was on depo from August 2017-October 2017. Then from October 2017 to February 2018 I was on the pill. While on the pill my periods were very irregular, I even skipped one. So I stopped it in February. Since then I've been fairly regular. Especially the last few months. AF is 2 days late, and I'm having some pressure in my lower stomach and light cramps. I haven't had any spotting. Could there be a chance that I'm pregnant? I tested the day my period was due and it was negative.

Here's some pictures of what my cycles have looked like for the past few months.

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