What will happen if i took the wrong contraceptive pill?

Depends on which one: If you have a typical 28 pill pack, the last 7 are placebos (no hormone). If you took that one, the effect would be the same as skipping a pill during the month. It is was one of the pills from the first 21 days, likely you will have no effect. In general with most pills if you skip more than one pill per cycle pack, you risk of pregnancy increases.