Gender disappointment

First of all- I would really prefer if you can't say anything helpful not to say anything as I'm really struggling. We tried to get pregnant for a while due to hypothyroidism, endometriosis and pcos so I understand what a blessing it is to be able to conceive at all. We found out this weekend we are having a boy. Prior to finding out gender I had very vivid dreams of a girl and grew attached to the vision of a daughter I had. The desire for a girl was furthered by the fact that my mother passed of cancer 4 years ago. I pictured my relationship with my child as a closeness similar to my relationship with my mother.  I don't know any men who have a close relationship with their mother as an adult without sending women running for the hills. Also this is my first child but I also have a stepson who is 7, so I understand what having a boy entails.  Doesn't help that my best friend that I grew up with is having a girl.  I'm having such a hard time getting excited about a boy and the guilt I feel for not being excited is really starting to push me into a depression. I struggle to feel connected to the child inside me. THIS is why I wanted to wait to find out gender until birth but my husband insisted on finding out early. Has anyone struggled with this before and been able to get over it before the baby is born?  Is professional counseling a good idea?