Ive been on cerazette for 10 months and suddenty my periods stopped, i thought i was pregnant and went to GP who looked at me like i had lost the plot!! did test at 4 weeeks but negative. however i have had false negative results in the past with my last baby. anyway its been nearly 3 months, i feel pregnant but dont trust tests as even doctors test was wrong before. GP not helpful and said dont worry about it u will find out eventually if you are,i suppose she is right. just wondered if its common to fall while on this pill.?