Princess that sounds really positive! Don't expect to much from an ic, they are great for a lot of things, but picking up at 7dpo may be out of it's capabilities. Pop down to the shops and grab a 3pack if frer. They should show a better line, and you can test a few mornings to see if the line gets stronger.
Shadow, implantation happened, so keep your same process. You know that sperm and egg met, and that egg found a nice spot. Otherwise you wouldn't have had any line at all. Just keep doing what you've been doing babe, you're so close!