I could have written your post. I am 9 weeks pg and DD1 is 26 months old. This was a planned pg, but I feel so ambiguous about it at times because of what I think a new baby will do to the relationship I have with DD. I cried at the beginning of the pg and not from happiness. And I was (am) so ashamed at feeling less than joyful at being pg. How can I be such a bad mom to this new little one with these feelings? I was so overjoyed the whole pg with DD1.
I still have these feelings, but they are diminishing somewhat. What has made the biggest impact on me is telling DD. She now talks about the "baby in mommy's belly" all the time. She says how she's going to share milk with her and show her the clock, put a bow in her hair (even though DD won't allow anything in her own hair!), share her pillow, etc.
She insists the baby is a sister. Of course, I know it may be a totally different story when this baby arrives, but sharing the pg with DD has made me feel better, and maybe catch of glimpse of the love siblings can have. Oh, and I have 2 sisters and a brother, and the brother and I are extremely close, yet I've still felt this way. I'm guessing it's normal, although I know what you mean about wanting to welcome this 2nd baby the same way you did your first. I am also not a "baby person" and love the toddler stage more.
Ok, I'm rambling, but basically from 5 wks pg to 9 wks pg, I am starting to feel much better. Still have my worries, but I think there is definitely an adjustment period, and probably it's necessary as you think about how your lives will change when a new life joins you.
Best wishes to you.