Pregnacare conception lengthening cycle?

[OnePotato2Potato]

I have a cycle between 28-35 days normally.
Im on CD36 and took pregnacare conception from CD21 onwards of this cycle only... could these multivitamins be lengthening my cycle?

Anyone have experience of this?
I took a hpt 11dpo which was a bfn and I will probably poas tomorrow morning if AF isnt here by then.

Thanks

I've heard vitamin b12 (which will be in the pregnacare) can lengthen luteal phase, but I imagine this would take time to have any effect. More likely you ovulated later than usual - happened to me a couple of months ago.

I took pregnacare, first month thought it was lengthening my cycle but it turned out I was pregnant! I swear switching to these was what made it happen after 9 months of trying!

Also didn't get my BFP until AF was 5 days late

I don’t know if there’s any evidence behind it but I started taking seven seas Trying for a baby which is similar, to get it into my system for a few months prior to TTC. my last 2 cycles have been even longer than usual, 38 and 37 days vs my usual 32-34 with loads of weird spotting. I think there might be something in the bit B12 theory, I feel like a ovulated later than usual both months. i’m now in my first month TTC and i’ve decided to stop them and just take folic acid instead to see if it improves.

did your cycle return to normal after you stopped?? Currently experiencing the weird spotting with slightly delayed cycle (32 days instead of 29-30)