Implantation bleeding, Period, Or...

Last week starting having a lot of clear slimy discharge and then Wednesday starting having bright blood with my discharge. Not enough to fill a pad. Period isn’t supposed to come for like 2 weeks but my boobs are sore and I’m a little cranky (normally my cramps are hell). Slimy discharge with the blood too when i wipe. A little freaked out, I called my OBGYN and I have an appointment Thursday...