Spotting

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I’m in my early twenties and this would be my first pregnancy. I’m just over 6 weeks pregnant. I’ve have extremely mild cramps on and off for a week but work up today to light brown spotting, just enough to see when wiping. I had sex last night and something felt off, but it wasn’t quite painful just uncomfortable. Is this normal or has anyone else experienced this? I had a doctors appointment on Monday and was told sex was safe and to stop if it hurt or caused bleeding and not do it again until I’ve seen a doctor. I’m just not sure what to do and it’s hard to not be scared.