Pink cm spotting 5 dpo 6dpo ivf

Sorry for tmi picture. I've had some slightly tinged pink cm at 5 dpo and 6dpo with cramping. It started afternoon of 5dpo with a small spot when wiping (1st pic) then I had quite a lot before bed when wiping. Then morning of 6dpo I noticed I had some more not not as pink maybe turned light brown and has now stopped. I seem to be feeling a bit cramps like my periods coming. I've not usually had this this early usually past 10 / 11dpo. We had ivf last cycle which failed so this is my first natural cycle since. It looked my I've ovulated on my normal day but anyone who has ivf noticed this the cycle after or had their period come out of cycle if they usually are regular. Thanks