Ugh I’m so confused with my cycle this month

So I’ve been TTC since May... my cycle has always been 30-32 every month... this month while taking OPK as usual, I got positive on days 20 & 21 while I usually get it days 16-17. Now I’m on cycle day 35 and still no period... I follow a few apps and I’m 2-3 days late on all and period keeps getting pushed back... I’ve taken two tests and BFN! I’m confused why my cycle is so weird this month after being regular for 5 months