Help, my body is going crazy!

Brittany • Wife to Jeremy-Mom to Emma, Averie and Liam-Trying for baby #4
According to Glow, which is usually right, I'm supposed to get AF on Tuesday. Well I just went to the bathroom and I'm bleeding, not heavy but it's there. Last month I was 4 days late and this month I'm 2 days early! How am I ever going to get pregnant with these wacky cycles! Before these last few cycles I've always been regular, so what the heck is going on?