implantation bleeding vs Period

Fatima
It's so confusing! Second day after ovulating I started with bloating everyday, constipation, tired and moody. And then yesterday a week after ovulation in the afternoon started with light brown discharge overnight both brown and red. I had a panty liner which was full and stained my pants light red. I have mild cramps. My period never start with brown discharge and is supposed to start in 5 days. 
Need advice!!!!