My service engine light is flashing brake light is on and battery light is on constant, car is running rough. It was running fine I went to the grocery store when I came out this was happening

 

Sounds like battery, alternator or both. Or even bad connections to the aforementioned items.

 

Exactly what LT Leary said.

I checked my maintenance notes for work I've had done to my 2010. I've replaced basically all the normal wear items except the alternator. My car is in the shop right now getting a few of the pulleys replaced and a new serpentine belt. Maybe this is in my near future, I've never had a Nissan alternator last this long before.