Pleas help!! Need advice

So I’m actively TTC- 10months in with pcos

Currently on cycle day 75

we BD every 3 days or so, and yesterday we did too. this morning I have had the lightest spotting ever. Never usually spot at all! But less than 6hours later it’s stopped ? And it wasn’t red or pink it was like a lighhtttttttt brown and I mean light! I’ve attached a TMI photo of when I wiped. I Thought it was a period but it’s disappeared 😂 and I don’t usually get this before af I usually get dark brown or pink/red spotting then the big flood like an hour or so later 😂

Been taking tests and they are all negative. attached is the latest photo which is negative. My period is 37 days late according to glow but with my pcos god knows if this is accurate or not! I have been actively tracking my temps and such and haven’t identified ovulation ... I have absolutely no idea what my body is doing I’m so confused 🤷🏽‍♀️

Any ideas on what this could be ladies ?

Thanks for the help!!

I have my first fertility appointment in 4 weeks so I’ll mention it to them