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If you have taken i-pill as advised after the sexual act or in your case rubbing of penis over vagina.Since you have already taken it twice no need for another one.Please understand that I-pill is a emergency contraception
and should be used only once as hapazard way of using it may cause hormonal
problems and disturb your cycles badly.So if you are sexually active then get a regular contraceptive pill prescribed by a doctor and you can use it regularly and prevent pregnancy
as well as keep your cycles maintained.Remember I-pill is a emergency contraceptive pill
and you are trying to create emergency almost every alternate day which will create problems of periods in future.