what should i do

hey ladies, heres a bit of history, my af have always been from 4 to 5 weeks apart, but the last 2 cycles theyve been 3 weeks apart, and if i was going by a 3 week cycle again, i would have been due to come on yesterday, and now im a day late. but i dont know if i should test because of the last 2 cycles being 3 weeks apart, or should i wait til next week. but knowing my luck, il get af any time soon lol. but have this urge to test because ive been a bit more relaxed ttc this month, who knows it could have worked. what would you ladies do in my position xx