Need some support!

Kesha • I have 2 kids, they are now 16 & 7. I have 2 step children that are 16 & 11. Hubby & I are expecting our first together.
I knew from the beginning of our marriage my husband did not want more children. Together we have 4. 2 are his and 2 are mine. Since our marriage I've had 2 miscarriages due to our birth control method not being very reliable. About a year ago I decided to go on the pill so we didn't have to worry about it. And now, surprise!!! I'm pregnant. I'm excited about having another baby but I knew my husband wouldn't be. But, after my appointment today, I knew I had to tell him. I expected a not so happy response. But instead he didn't say anything, he just got up and left. I have no idea where he went or when he'll come back. I'm an emotional wreck and I don't know how to handle this right now!!! Please, any words of encouragement or helpful advise would be greatly appreciated!!!