I have become a fountain again

I have not really leaked (except at night occasionally) since Jake was about 4 months old and all of a sudden I am leaking randomly.. watching tv, talking on the phone, typing up documents (thank goodness not while out!).
Anyone had this???
It could be unrelated to pg and be due to Jake's intake changing based on the humidity but its only been this past week and the humidty has been around for longer than that...
I cant believe I am wearing breast pads again