Scared!!?? :/

I'm 5 weeks and 3 days my 6 week check up is next week but I had sex last night after the doctor told me nothing inside th vagina until my 6 week check up it felt good but a little sore afterwards and now I'm worried I have an infection or something anyone else have sex before their Clarence check up? Was everything ok? I have brownish like aftermathperiod color discharge is this normal