hey hun, im going through the same thing ATM.
itchy vagina= thrush for me, maybe go to the docs to se if thats what u have.
as for the green/yellow mucous, i have that too but its not unusual for me. when ur pregnant ur mucous does change and you might find u have more or less of it than u normally do.
i wouldnt panic too much, sounds pretty normal, but go to ur docs earlier to have it checked out and to get urself some cream for the itchyness!!!
HTH
Skye