Longer cycles

Ruth • Had my beautiful rainbow baby.
I have always had 28/29 day cycles on the dot for years.  For the past 6mo or so I am up to 34 day cycles.  Anyone have any ideas on why this could be?  I haven't had any weight changes, I have been taking Vitex for this entire time, could that cause lengthened cycles?  Is this longer cycle going to make it harder TTC?