Confirmation for pregnancy. Over?

I and my female partner don't have any direct unprotected intercourse but the pre cum cross the underwear and jeanse pant together and the finger touch the wet place and the finger insert into the vagina of my female directly skin contact... It was happened on 29 September and her periods was dated 18 october and the period occurred on that day 18 october lasts for 5 days with dark red or brown blood where as her last period was in 18 September and second last period was in 22 August...Is there any implantation occurs from the incidents of 29 September?... Is she pregnant from the incidents of 29 September?... Is there any chances for pregnancy from the incidents of 29 September ? Is the describing semen is considered as fresh semen? Can she becomes pregnant from the incidents of 29 September after her 18 october periods over?