Implantation-what do u think?

Hi, i am now on cd30 (usually 28-30 days). On cd28 i had relatively thick cm mixed with some blood mainly when i wiped or from just inside (tmi sorry!), def not enough for a towel. This appears now to have disappeared and no af seems to be progressing like i expected. Although i have slight backache and expect af is on her way. Does this sound familiar to anyone and what was the outcome bfp or bfn? Thank u