Itchy labia on period?

I started my period today and yet my labia and actual vagina have felt a bit itchy on and off. I’ve had thrush once before but never on my period and obviously it’s difficult for me to tell as I can’t see my cm to monitor that.. just looks like a normal period. I have some canisten that I’ve applied but would like to get to the root cause if anyone has any ideas! I’ve had a Google and it could be hormonal but this hasn’t happened before. Thanks in advance everyone!