Hi and welcome to MM
I'm a bit confused- is it two years since your last period or us was it last October?
You could simply have a bit of bacterial vaginitis. If it feels uncomfortably - so itchy or sore - then it may be worth seeing the GP to have a swob taken to check for infection, although BV is rarely treated.
I use some Multi Gyn Actigel for a few days which restores the ph balance and flora to fight the infection.
When meno hits, the flora balance in the vagina, that prevents infection, is lost resulting in more thrush, BV and also a greater risk of UTIs. You need some local oestrogen eg Vagifem and it's also good to use vaginal Moisturiser eg SYLK or the YES products which you can buy online.
Stress will make us more prone to all sorts of things but I doubt this change us serious.
DG x