I was taking ortho-novum 777 up until May of this year. Since June last year I was feeling crummy and gyn said to make the change because Ovcon35 gives an even dose of the hormones through the month and also the lower dose of progestin. At first I thought I was feeling better but that was short lived. Instead of switching to another bcp I decided to take a rest. The bad part is that I miss the timing of having my period during the placebo week. Now I am all over the map...day 31 the 1st month off, day 21 the 2nd month. Who knows when this month. This better be peri for all the yuckiness I put up with every month.