I remember having this problem with Joshua too. I HAD to go back to work and he was around 9/10 months old. He went to family day care but would cry and cry when I dropped him off then he added crying cos he didn't want to leave when I picked him up (so crying at drop off and pick up)...he eventually did get past this but it did take a while and I'm pretty sure he was past 12 months when it settled properly. It was very heartbreaking, but they do get past it. for you