FlyingNewbie .... There is a similar thread on here regarding someone else with mild depresision and an intial class one. As someone else said be honest and be yourself. I would add that the AME will have access to your medical reports, so I think it might be easier to do your class one in Ireland, if that is where you medical records are.
I think there are only two IAA medical examiners in Ireland, the senior one (TG), if that is your AME, if not request him, he is an ex GP, surgeon and Ryanair Captain. top bloke and I am sure he will work with you rather than against you, it is not a case pass of fail, he will need probably need in your medical notes to make further enquiries.
I feel sure he would be fair and honest, as an ATPL, to any problems you might have in the future in relations to psycholological issues, and your prospects for the future.
PM if you want his name.