Sounds exactly like my son was when his sister was on her way. He was very clingy and possessive of me and got quite upset when I held other people's babies. I constantly reassured him that nothing would change how I felt about him, I wuld just somone else for us to love. He was worried though that I was becoming someone else's mommy and I would no longer be his. He also didn't want me to leave him when I went to the hospital to deliver, he wanted to come with me, and he was super stressed out about being left behind. I just had to keep reassuring him. I took him to all my ultrasounds and he liked helping the Dr find her heartbeat with the doppler.

When I went into labour (he was 2.5) he freaked out at being left behind but there was not much I could do, I had to go and he couldn't come. He was very happy to be able to come visit me in the hospital after but he didn't want to go home to bed without mommy and he again was upset. I left a present for him in the living room before we went to the hospital and so I told him there was a present waiting at home for him from his little sister. He was all of a sudden excited to go home.

For about 4-6 months after she arrived he was very clingy with me. He loved her dearly and always wanted to hold her and help with her, but he had a hard time sharing my attention. Any time daddy offered to help him he would scream and cry for mommy to do it. He finally realized though that I still loved him and I was still there for him when he needed me and he finally adjusted and allowed daddy to help him again and stopped clinging to me so much.

It was tough for a bit but now they love each other so much (he is 4, she is almost 2) that she cries when I drop him off at preschool, and he cries when I tease him and pretend I left her behind at the park.