Help scared confused

So me and my boyfriend of 6 years have been low key trying to conceive just by me and getting off my bc to see if it would just happen, well now I’m a few days late with AF feeling very nauseous and dizzy with some light cramping and now all the sudden I’m scared and kinda don’t wanna be pregnant if I am, I just don’t get it I wanted it so bad before not thinking I could even get pregnant and now i don’t even know if this was the right move. Any advice?