Forget implantation. Bleeding, it's unreliable and usually doesn't happen. If you know when you ovulated you can test 11-12 days after that, if you don't know ovulation you can test 1-2 days before your next expected period.
See below. That's about the time it will turn positive.
About a week. Test in a week and if negative test again in another week.
Yes, err... You can take a pregnancy test anytime you like. "implantation bleeding" is voodoo, if you want to do hpt you should time it off something reliable - like OPK are when your period is expected.
About a week. Generally implantation bleeding occurs around 7 days post ovulation. Although blood pregnant tests can be positive a day or so later; to be sure, you should wait about a week than you can do a urine pg test, that if you are pg, should be positive. If it is negative and you have not gotten your period, do a blood pg test because urine pg test are not 100% accurate. Good luck.
Yes if the fetus is. Still viable. A fetus takes about two weeks to make enough HCG for a positive pregnancy test. At six weeks after implantation, a negative pregnancy test would rule out pregnancy.
After missed period. It is better to wait 4-5 days after a missed period to do pregnancy test. Use first morning urine and follow the instructions carefully.
Wait a little longer. If you miss your period that would be a good time to take a standard home pregnancy test - an early pregnancy test may detect pregnancy prior to that.
Pregnancy test. 11-12 days after ovulation you can get a reliable pregnancy test, occasionally they'll be accurate 10 days post-ov. "implanttaion bleeding" is mostly intenet nonsense; it mostly doesn;'t happen at all, and you can't time a pregnancy test off it.