NEED HELPPPP

one week ago Me and my boyf had sex. he used condom and cum inside . but after he pulled out the condom slip off and left in my vagina a little bit . after I pull out the condom. we checked the condom and there is cum inside .

at that time my condition:

in my last day of periods and bleeding light.

i have take a plan B 1 day after we had sex because iam not sure iam safe.

and today. I found this in my panties.

i searched in the internet that pregnancy can cause the bleed but iam not sure what it is .

can someon give me an advice?:(