Hi. I came off the progesterone only pill after only 3 months of taking it because it wasn’t agreeing with me and I was bad at taking it at the same time everyday. Me and my partner have never used anything but the withdrawal method and I have only experience one late period which was only max 5 days late. I am now 21 days late since my last period on the pill and 7 days late since my withdrawal bleed. I have taken 4 pregnancy tests at home and all negative. What could it be? Starting to feel down about it all now.