My DD is 9 and a half months old and she is SO clingy. I can't leave her alone at all. I bought a play pen to pop her in with toys in hopes that would work but she just screams until I come back into the room. I can't even stand up off the sofa without her crying anymore, can't pop to the loo or make us both food without screaming and tears. Sometimes I can't even sit her next to me, she HAS to be on me. I feel like I'm at my wit's end, please tell me this will pass? It's been going on for months already.