Paranoid please help

I’ve been paranoid about pregnancy for a few years because I went through a situation that I never want to have to go through again. But back in June I was drinking with some friends and I got paranoid that I did something with someone and forgot or whatever. My friend told me though because he knows how I get that I never went off with anyone or did anything. But me being the paranoid person that I am went and got a plan b on the Monday after and I’m on birth control. But I took a test and this is what came up. Idk if it’s just an evap or something and I even just recently went to the gynecologist for my annual and she knows how I am to because she helped me through the situation and she said everything looked fine and I’m sure if I was she would have been able to tell especially since all this happened in June. I’m just looking for some advice. Thank you in advance.