Full period bleeding 7 days early?

Hello. So I posted yesterday that i had brown discharge for a couple days with eggwhite discharge.. I feel like I have my period now.. my cycle is usually 27 days.. went down to 26 after my miscarriage in December.. this month I would have delivered.. So my body isn't going to think time to have the baby. anyone else ever start 7 days early for no reason? this has never happened to me before.. I have always been on time with my cycle. so a little nervous as to what could be causing me to bleed so early. just looking for siniliar situations so I can relax..