Light bleeding at 6 DPO?

I’m having light bleeding at around 6 DPO. I can’t say for sure because I didn’t use OPKs this cycle. I’m not sure if I should be worried that my uterine lining isn’t properly forming because a similar situation happened last cycle and then was followed with an odd, scanty period. However, last cycle it was only a little spotting and it happened during ovulation. This cycle I am roughly 6 DPO and I’ve had light bleeding and cramping. I’m not sure if my period is starting early or what. Has this happened to anyone else? Insight is appreciated 🙏🏻

Info: TTC 13 months, 2 MCs, 33 day cycles, 14 day luteal phases, 7 day periods