Debbie,

Implantation usually happens between 7-10DPO - everyone is different and you would assume the bleeding would follow this time frame.

I'm sure you will be fine with the exercising thing, I know when I was pregnant I had no idea until 5 & 1/2 weeks and did everything wrong by the so called books, you will find that many people would also be in the same boat.

You wont have any pregnancy signs or symptoms until bubba implants into your uterus - it's the foetus that produces the hCG once implanted and not anytime before then. So this is why they say to test for pregnancy when you would normally get your period, as you will have no pregnancy hormone in your body until after implantation.

If you get heavy bleeding and cramping, it would be wise to check it out with your doctor, but I wouldn't panic. Good luck!