Hello. I am 23 years old and have 9 months left of my implant. I am not trying to conceive but I was concerned I may be pregnant. I had unprotected sex a few times with my boyfriend just over 2 weeks ago. I don’t have regular periods but I had ONE day of brown discharge 2 days ago? Old blood? I work in a surgery so took a test which was faintly positive. I then took another one (Asda brand only) which was negative. Should I wait a few days and take another in the morning? Many thanks.