Hi can anyone help? I came off cerazette 28 days ago today TTC. No withdrawal bleed, regular DTD. On day 24 off the pill I felt very suddenly nauseous, day 25 I thought I was getting my period but it was one day of brown and light pink blood and cramping that went away the next day and I felt fine. On day 26 4am I woke up tasting blood but nothing there in my mouth. On day 27 I got lower back pain, day 28 today feel fine and got a BFN this morning. Any idea if this was a withdrawal or implantation bleed? Surely a withdrawal bleed would come quicker, heavier and last longer? I got no period on cerazette at all. If I could be pregnant, when should I test as no last date of period? Thanks x