emotional

I found out today I'm pregnant. our daughter is 7 months old. we were using the withdrawl method. well I guess I was off on my ovulation because here we are. My partner says I should give it up for adoption. I know there's families out there that'd love a baby but I don't think I physically have the strength to give my flesh and blood away. I'm not mad at him were entitled to our opinions. itd be child number 3. and I guess I'm in shock. any advice on how to handle this better? I know it's our fault I'm not denying it. I'm just having a hard time handling it