Wa'alaikum assalam sis! Congrats on the positive tests! Lendir coklat/merah at this early stage boleh normal (implantation bleeding), tapi since you're seeing it a few times in a row, better check with your doctor or klinik as soon as possible, they'll do a scan to make sure everything is progressing okay and put your mind at ease. Jangan tunggu lama-lama, go tomorrow or today if you can, sebab at 4 weeks+ they should be able to confirm with a proper check. Doa-doa semoga semuanya smooth, and do update us!