Am I pregnant?

Hi all. So I know this is a vague question but let me go into more detail. So on December 11, 2020, I had sex. I made a mistake but to the point, I need help! I would be around week 9 on the pregnancy calendar now but have no symptoms except for a little acne, but not severe. I took a pregnancy test at week 6 about 2-3 days before my 2nd scheduled period and it came back negative. I have had what I thought were two periods because they were both heavy and normal as all my other ones. I am just scared right now and don't want to be pregnant and just need someone else's opinion as to what they think based on what I have said. Thanks!