CD 24 and brownish color on toilet pic

CD 24 and I just want pee and wiped and had brownish color stuff on my toilet paper and underwear..about the size of a half dollar on each. No cramps but my boobs are slightly sore. AF should be here anytime from 1/1-1/5 ..I never had spotting before my do you think it's a good sign? I've also been sleeping like 4 hour naps everyday ?