Good day! Ladies, could you tell me if anyone has experienced this: 13…

Good day! Ladies, could you tell me if anyone has experienced this: 13 weeks pregnant, 3 days in, yesterday I had an appointment with G. She looked at me from the chair, did a transvaginal ultrasound, everything is good, everything is clean without bad discharge, the neckline is normal, the length is also normal, everything is fine with the baby too. This morning, some brown discharge appeared, a little bit but there is. Could it be after the examination because they looked inside, or what. What could it be? Should I go to the doctor?