Question: Is there is any vaginal bleeding happen during pregnancy

I had a sex with my gf on 22 nov and she hold my p in her hand and after that by mistaken she touched her v with same hand, and she took unwanted 72 same day after a sex , and that week was her periods time, because she had already delayed her periods last month because of excessive use of pills and had her unexpected bleeding as I told u ago, and on 26 nov we get physical not intercourse but seduce and 28 nov she had a bleeding in a continous flow for 2 days,i.e 28,29 nov she had a bleeding but she confused whether she was in periods or unexpected bleeding due to pills because that time was her periods time , and on 29 evening she took another pills for safer side in already being in bleeding after that her bleeding stopped and on 11 dec she had a bleeding whole day and stopped next day and not yet continues, please suggest me what was that ? And is she safe from pregnancy , and when her periods will continue for the November one?

Is that was her periods on 28 , 29 nov when she was bleeding in continuosly way until she took pill and bleeding stopped on 29 evening, and on 11 dec she had again bleeding and stopped next day and not yet continued