My period is confusing me 😕

I have been of my birth control pill for 2 months or so now and my last period was 6 weeks after my last period and off the pill for the first time in 3 years. The last period last only 3 days 😕 I'm due this Wednesday 😕 when do I take a pregnancy test?? I got 2 other boys and this late period has never happened in my life that's why it's confusing me.. what's happening to my body?? Hope this makes sense 😊