SOS pregnant????

So today I was peeing and some mucus and blood came out together. I just got off my period a week and a half ago. I've had sex since. Is this a sign of pregnancy?? My boobs don't hurt but I've felt nauseous all day today. I want to take a pregnancy test but I'm scared to get one/ ask and I don't if it'd even show up because I've only had sex in the last week i dont know if you can tell that soon or not. Need some input thanks💖