I know it sounds stupid but I have severe anxiety with anything ..... help 😩

Me and my boyfriend has sex with a condom but I still make him pull out because I'm really paranoid about it cause I'm only 16 and I really don't want a kid at this age. I'm due on my period but I haven't had any signs of it coming yet ??? It should be tomorrow I come on but I usually have a bad stomach, bad headaches, loads of spots but I have nothing ??? Is there any chance I could be pregnant ??