I am using cerazette after having a termination, and I find it very hard to trust it whithout using a condom, I have been taking it for about a year now, and for the first 6 months I was bleeding on and off nearly every other day, but now I haven't been on since then, I have done loads of pregnancy tests since and have all come back negative as I have still been using a comdom, but I want to start trusting it without the use of condoms, how effective is cerazette without a condom, and what is the risk that I may become pregnant?