i am 19 yrs old.my menstrual cycle is of 33 days.during menstruation,there is bleeding for 8 days.last month i had sex in unsafe period(without ejaculation inside),and my menstruation was on time but it bleeded for only 5 days only.this month again i had sex(but he did not ejaculate inside) in unsafe period,on my 16th day of menstrual cycle.then i had sex again(without ejaculation) on my 25th day of cycle,and there was bleeding after sex.only few spots of brown colour on the day of sex and heavy bleeding the next day..it seems to be menstruation bleeding,but i m bit confused,,there is no odor this time! but there is heavy bleeding and red in colour... it is 1 week early!! i never had my periods so early..what can be the reason?is there any chance of pregnancy??can it be implantation bleeding?what can be the reason for so early periods?
i am also preparing for exams and have lot of stress these days..can it be because of this reason?pls help.