Serious question !!!

Okay so I have a question. If your going to judge don’t comment. I had sex last month with someone I was talking to unprotected and yes I texted a week later came back negative. Than last week I did it again with someone else and I blacked that night and was taken advantage of. Three days later I went for testing came back positive for chlymidia. Can it be that I had it and the first test was wrong ? It was it the second person. I haven’t ever had an std and I’m 30 years old. I’m freaking out scared.