Wa'alaikumassalam sis! Lendir coklat tu memang confusing kan, especially kalau pattern dia different from your usual period. Tapi honestly, without a test kita tak boleh confirm, bisa implantation bleeding (kalau pregnant), bisa hormonal, bisa sebab lain. The safest thing is do a pregnancy test asap or see your gynae, especially since you're feeling feverish jugak (that part kita kena check out). A few of my mum friends ada yang experienced brown discharge early pregnancy, tapi ada jugak yang it was nothing, so each person lain. Jangan tahan rasa demam tu, better check with doctor to be sure ya, sayang.