Has anyone changed their mind?

I really hope I don't get flack for asking this, but had anyone been having second thoughts since they found out they were pregnant? I'm 32, married and purposely tried for this. I'm so shocked at my feelings. I've been a wreck since I've found out, arguing awfully with my husband, doubting my own ability as a parent and just questioning why I am doing this. I never thought id feel this way. But I'm terrified of their no longer being a choice in 3 or 4 weeks. I'm an emotional wreck and feeling so fragile. Just been to therapy with my husband and the therapist was so unkind. She basically just said well book a termination or don't. You've got to decide and moved on. I would really massively appreciate hearing from anyone who does or has felt the same, and what you did about it.