hello dr norman,
I should start my yasmin pills on Thursday..i took Thursday pill on Wednesday by mistake ..what should I do?
You don't lose any protection. You could just continue the new pack and then you'd be starting a new pack always on a Wednesday.
If you wish to go back to a Thursday start, you could use an extra active pill from another pack to get you back so you finish on a Wednesday and start on Thursday again. To maintain protection, you can't go more than 7 days without taking an active pill.