Implantation Bleeding?

How long does implantation bleeding normally occur after intercourse? Could it be as short as 4-5 days? It came at the same time as my period was due but only 4/5 days after intercourse. That's way to early and it's most likely my monthly cycle right???  

[Sarah61086]

YOU ARE MOST LIKELY GOING TO OVULATE 14 DAYS BEFORE YOUR EXPECTED PERIOD, IMPLANTATION HAPPENS BETWEEN 3-12 DAYS, BUT ON AVERAGE 7-10 DAYS, AND YOU COULD SEE AN IMPLANTATION BLEED 24-48HRS AFTER THAT.


EG
28 DAY MONTH CYCLE
OVULATE ON DAY 14
IMPLANT ON DAY 21
IMPLANTATION BLEED ON DAY 22
EXPECTED PERIOD ON DAY 28

NOT EVERYONE WILL HAVE AN IMPLANTATION BLEED, SO BEST TO TEST ON THE DAY YOUR PERIOD IS EXPECTED.