Had unprotected intercourse (pull out method) and observing very very light spotting 6 days after intercourse. request you to explain what the spotting might mean?

My first guess is it is your period but u did not send menses details. Go to uptodate.com and read more. Then discuss with your team.

Implantation bleeding appears likely as far as timing as pull out method has a high rate of failure. Testing for pregnancy would be appropriate about 3 weeks from intercourse. If trying to conceive you should get established with Ob-Gyn.