How do I switch from Quasense to Ortho-tri-cyclen

I have took Quasense for the last 3 months (my first pack). I just started my 2nd pack of Quasense (week 1 of the 3 months pack). I realize that it is probably b/c of my switch that I am breaking out. I would like to switch back to Trinessa (which is the generic version of Ortho Tri-cyclen). But I don't know if I can simply start the Trinessa this coming sunday or what the procedure is. I don't want to wait 3 months before I can switch back... Any ideas? Thanks.