DD is 9 mnths and has terrible separation anxiety. It started just after Christmas so about 4 months ago. We've done lots of playing 'boo' etc and it has subsided a little at points but it's getting worse again.
Right now she's screaming because 15 mins ago I walked out of the room (waving bye, bye) leaving her in her high chair with DH feeding her. She'd been happily eating moments before but the moment I left she started crying hysterically and hasn't stopped. If the two of us are in a room together she'll play for a bit but then come and cling to my leg, cry to be picked up and get herself worked into a terrible state if I put her down. If other people are around she just wants me to hold her. e.g. this morning she was in my arms and playing with DH (who is very hands on and around a lot), I passed her to him and we had immediate tears even though I was about 10 cm from her.
I went back to work this week and so that's clearly making things worse, although it was her 5th week at nursery so she should have settled. At nursery she's finally got to the point where she'll only cry for half the time and her key worker says that DD cries if she leaves the room too.
What do I do? DH says she's being silly, just leave her, don't pick her up and she'll get used to it. I'm worried that she'll just be more anxious if the thing that she's anxious about keeps happening IYSWIM. Sorry this is a bit long but would appreciate any help.