me and my boyfriend had protected sex ( using condom) also he ejacuated outside (on my face and chest) and then we had a hotwater shower.It has been around 17 days since we had sex. After that i have been experiencing extreme stress and anxiety due to personal reasons, misssed my periods (even though i went through PMS) and now im experiencing spotting. is there a chance that i'm pregnant or is it just because of stress?