Ahhh I totally understand the worry, first pregnancy memang macam ni, setiap small thing kita overthink! Brown discharge at 6 weeks is actually quite common, especially kalau implantation or hormonal changes, so try not to panic too much even though easier said than done kan. A few of my mum friends experienced the same thing early on and everything turned out fine, but since your doctor already gave you medication and a follow-up date, that's the best thing, just take it as prescribed and try to rest. The fact that you've got breast tenderness and fatigue is actually a good sign that your hormones are doing their thing. Hang in there, mama, in 2 weeks you'll get more clarity and I'm sure everything will be okay!