It is a good idea to schedule an appointment with your OB/GYN to discuss your question. Implantation bleeding
typically happens around 8 days after conception. This is a phenomenon that not all women experience. In general conception follows the following order. Intercourse usually needs to occur in the few days before ovulation or on the day of ovulation in order for conception to occur. This is because while sperm can live inside the woman's uterus and fallopian tubes for up to several days, the egg can only survive outside of the ovaries for just over a day. Therefore, on the day of ovulation if conception is going to occur it will usually occur that day or the next. You can add 8 days on to that day and that should be the date that you would experience implantation bleeding if it were to occur. In addition, around this time is the first time that you will test positive on a pregnancy test. Thus, there's no real reason for you to use the presence of implantation bleeding is a marker of whether or not you were pregnant. A much more reliable method is to go out and buy a home pregnancy test at a local grocery store. These tests are quite accurate and fairly inexpensive. If the test comes back positive, or you have additional questions, you should always schedule an appointment with your OB/GYN. This is also a good idea if you're trying to get pregnant. It is always good to have your doctor
on board when you start trying to conceive so that the two of you can discuss issues when they arise.