Can I take a pregnancy test 7 days after sex?

no.

wait 2 weeks.

You won't get a positive that way. It's best to wait 14 days after ovulation or until you miss your period

You might want to wait until after you miss your period.

Took 4 weeks for me to get a positive...I spent way to much money on those damn tests..lol

I got my positive (dark one too) 8 days after ovulation