light brown spotting

Jennifer • 22❤️ • married to my best friend 🙈😘 • trying for baby #1 • " I put everything on gods hands 💕🙏🏻
Hi ladies so I just went to the bathroom and  I noticed that I discharge a light brown / red could it be my AF or implantación bleeding 
( I had bad headaches today and yesterday as well as cramping but cramping only happens when my AF is coming but it usually happens next day ) any ideas ? 👍👎🏻