I was on ortho-tri cyclen lo, im switching to yaz. tommorrow is my sunday start !

I was on ortho-tri cyclen lo, im switching to yaz. tommorrow is my sunday start .?

i had been on ortho tri-cyclen lo for 2 months. should i wait because im switching to yaz ? or can i have sex without any worries by tommorrow ?

Technically, it is advised that you use a back-up method for 7 days when switching.

But if you are making a clean switch, at the end of the pack with no missed pills, I honestly don't think you have anything to worry about.
Yaz and OTC Lo are both combined pills (estrogen & progesterone), and both low dose. It's just a different formulation of progesterone. It's not like you are switching from a high dose to a low dose, you know?
I think you will be fine.