What's MDO?
What I did that helped a lot during the day is to give him lots of attention when he was feeling really needy, before I had to get chores done... Then, I'd set him up w/toys near me and keep him in the same area. Squat down to his level to reassure him if he needed it...
Also, constantly saying I'll be right back if I left the room, continuing to speak to him as I moved about the house so he could hear my voice...
Reassuring him that Mama always comes back for you...
Explaining our routine endlessly throughout the day...
ex- after lunch you'll take a nap, and then we'll go get Daddy at work and he will play with you while Mama is working. Then we'll have supper together, etc...
Always reaffirming that I'll be back.
At night it's harder, because you're so exhausted.
I can say that it was a developmental phase that passed. It was a little rough for us for about a month...
HTH...