Hi sweetie and welcome to BB. You may get more responses if you start your own thread, btw. (Although this did make me smile again, so thanks for bumping!)

As far as I'm aware, implantation bleeding happens just before you're due, or just after, or around the time (I'm not too regular so don't know how this "due" thing works anyway). It's just a few spots of light brown blood and not that noticable if you wear dark pants.

If your period is late in any way and you've had sex this cycle and you think you may be pregnant, there's no harm in doing a test. Even if you don't think your pregnant - at least you're sat on the loo when you get the results LOL. (Unless you just order a blood test at the hospital, which involves all the lab finding out before you.) If this bleeding is nine days before a period and your last period was normal, wait until you're late and then test.

Good luck!