Implantation?

I ovulated close to the 12th of January and the night of the 22nd I started having a brown discharge only when I wipe it is now the 24th and this morning it was blood but only when I wipe I am cramping a little bit not like menstural cramps, took hpt this morning it was negative period is suppose to start Monday in 2 days.. Anyone know what this is or what's happening?