I am so overwhelmed. Dont know what to do!!!

My husban and I have been together for almost 8 yrs. I had a 4 yr old daughter when we decided to live together. I also have a 5 yr old girl and a 4 yr old son. We had talked about having one more and where ttc for 2 months before he changed his mind. I talked to the doctor about geting back on birth control and he said i had to wait. Well now i am 6 days late and when i told him, he said i had to think about what i wanted to do. He had already told me he didnt want more kids. And now i dont even know what to think about the whole thing!