Call your gyno. A nurse there can tell you when to start the Yaz.
with the Ortho it took me 4months to get over the side effects. took it for 6 months before TTCin n it wasn't so bad. as for the Yasmin, it gave me horrible migraines and I kept on vomiting every time I took it. if ur sure about the Yasmin pills then I'd recommend that u wait until u finish ur ortho first to avoid unnecessary bleeding.
Good luck!