My period is late like 10 days. I haven't had sex.?
normally my period is not regular.It normally on 30-32 days.sometimes even 34-36.I don't no why.

here's the detail

I do exercises and changed my diet.(only get soup for my dinner.)
I visited my aunt in mid September.
I got a Ayurveda medicine on 2-3 days before my expected period for diarrhea which is common to me.and it's very powerful.because I got bad feeling even day after.
Also our new academic session is ready to start and I'm in some sort of stress.
my due date is 27-30 of October.Within those days I felt my period is coming.But nothing happen.Now I haven't have any feeling about on coming period.I think it will be missed.
my vagina is so itchy in these days.(common to me.It's start before 6 month ago
Is this normal under those circumstances or should I worry

please help me...