In shock/freaking out a bit

Hi ladies, wondering if what I'm feeling is normal...

Some background:

TTC for 2.5 years, including an IVF cycle that ended in MC. Got pregnant naturally without trying as we were getting ready for second round of IVF and gave birth to healthy baby boy. My son is now 10 months old.

Because of all my past struggles getting pregnant, I really thought it would take a little while to get pregnant again, if I was even able to. I'm almost 38yo. This was my first month that I stopped taking BC and we only DTD once. And I got a BFP this morning 🤯

I'm totally in shock right now and it doesn't feel real at all. And even though I knew we'd have to have another kid soon if we wanted my son to have a sibling (due to my age) I'm still freaking out about having 2 under 2 and scared that my relationship with my son is going to change. In short, this is what I wanted and now that it's happening I'm scared to death. Is this normal?? 😬