I had spotting and bleeds up to about 8 to 9 weeks with my ivf pregnancy, it started at 10dp3dt and was on and off, all colours. I was told by the recurrent miscarriage clinic it was implantation, even late on. The scans were fine, the pregnancy didn't end well but that was due to other reasons, the bleeds weren't an indicator as I miscarried at 12 weeks when bleeding had been gone for a while.
Maybe try clearblue digital to see if hormones are rising or gp might do bloods to check? Xx