Need advice

I've only been ttc for 2 months af can be irregular from time to time. According to glow af is due Monday the 6th but I woke this morning to a little bleeding and when I took the tampon out couple of hours later it was brownish with a little red blood, now nothing for a few hours and normally once af starts it gets heavy quickly. Any ideas? I did think implantaion bleeding but I thought that would of happened before now 😔 am confused and grasping at straws Anybody any help or suggestions thank you