If, for your last three consecutive cycles, you began your flow on the fourth morning after stopping active pills, then you have a veset kavua for the fourth day, daytime onah. That means that relations are permitted the night before.

Since this is a veset kavua, if you forget or omit the bedikah during the onah for any reason, relations are forbidden even after the onah ends, until you perform a bedikah.

You are released from observing other veset days, unless your pattern changes, and then you will have additional vesatot to observe.