Sunbloom,
I thk you have exactly the same problem as me, my boy turn 4 in april, he have mood swing since my gal arrive and super active all the time, jealous also when I carry his sis, we notice he want lots of attention, so i give him 100% when he needs it, hubby will take care of my gal and maid help during the day. We have send him for accessment in April at the polyclinic and was told that he might have mild ADHD, so we got a referral to KKH for further assesment, but appointment will be on 9 July, can you imagine a 3 months waitlist??