Could be pregnant, help??

K so. On May 16th I had sex, no condom and I'm not on birth control, and he pulled out. I know it was a stupid thing to do and I know I shouldn't do it again and I know about precum, so I'm not here for a lecture don't worry. Based on where I was in my cycle, which was close to the end, I should not have been ovulating. That month my period was late, so I took a pregnancy test and it was NEGATIVE. My period ended up coming a week late anyway, and it was a relatively normal period. But idk, I'm still just super paranoid that I maybe just got my period anyway and the pregnancy test was wrong, and it has me really anxious. It would be almost 6 weeks now since the day I had sex, would that be too late to still take another pregnancy test? Also do you think I'm overreacting about thinking I'm pregnant again?