birth control and CM??

Sarah
I got off birth control jan 15 and that first cycle I had EWCM.  I had some more in feb cycle and a little in March.  It has now disappeared!  Anyone know what might cause this?  Did I stop ovulating or something?  I took my first ovulation test this month and it said I ovulated on 6/14 but still no EWCM.  We have been using preseed but just curious if this has happened to anyone else?