Is it normal if i think i'm a jinx?

I really do feel like a jinx and it can be so annoying. They say to not believe everything you think and its just in your head, not out in reality so relax. I try but seriously, I'm always right! It can suck sometimes. Or they also say if you think it, you can actually make it happen. Kind of how when girls "think" they're pregnant and then it happens. Luckily, that's one of the things I've been wrong on. I have had pregnant scares but cause of contraceptives, we've prevented them or I was never pregnant in the first place. But other things, it fucken sucks. For ex., I knew this girl had a thing for my bf and I just met her, but I sensed it right when I heard her name. When she came to visit to go out with us and her friend, she asked if me and my bf were a "thing" and I said yes and she says "oh okay I didn't want it to be awkward or anything" wtf? why would it be awkward? Then for the rest of the night, she flirted anyways and asked him questions that I should be involved with but she basically avoided me pretending like I wasn't there. It kind of ruined our night cause he knows he was acting weird as well. I didn't wanna believe what I sensed, but it happened to be sorta true. Another thing, is sometimes my family and I will go to family gatherings that I dread cause there's always tension between me and my sister like comparisons. Again, I don't want to believe that we are being compared but it comes up in a conversation and I'm just like wow I knew this was going to happen but I was hoping it wouldn't. I would like to stop believing everything in my head cause it just causes me stress and to think it's probably not even true, stresses me more. But what stresses me the most, is when I stop believing my thoughts and I was right about them all along. Idk what to do about always being right. It's not always a good thing.