Hallow Dear,
Two days after menstrual bleeding has stopped is a day far from fertile window of the menstrual cycle.
Egg is released (ovulation) 14 days prior to next expected menses. A period of about one week around the day of ovulation is fertile window. So if the menstrual cycle is of 28 days, the day of ovulation would be day 14 and fertile window would be between day 10 and day 18.
You had sexual relations 2 days after the menstrual bleeding stopped. Again after 2 days the bleeding started during which you had intercourse. This day is far from the day fertile window. So the chances of
pregnancy due to this sexual intercourse are almost nil. However, you may confirm it 10 days after you had intercourse by
Beta hCG test.
Please try to avoid any sexual relations during bleeding phase. Blood is a very good medium for any organisms; hence she may catch some infection by intercourse during this phase.
Since, she has already started menstruating after delivery, please use some reliable
contraception like birth control pills, condom or
intrauterine device (with the advice of your Gynaecologist) to avoid pregnancy. In this phase, the chances of irregularities in menses should be kept in mind. Hence, fool proof contraception should be the practice.
I hope this helps you.
Dr. Nishikant Shrotri