Possibly pregnant with #2? 9mpp

Good evening all.

Kinda freaking out over here and trying very hard not to. One I don’t want to tank my supply as I’m BF my little one who will be 9 months in 10 days. And we did the deed on thanksgiving (not the first time but we got a little carried away and he let some slip before he pulled out). While I know it’s too soon to actually test. My anxiety is wanting to go through the roof. I’m symptom spotting but I feel like I am and while we will love this other one, it’s not what we wanted. We didn’t want 2 under 2 even for a couple months. We aren’t prepared for it because we can’t ask his family to take on another kid of ours while we work to provide for them. One of us still has to go to school, it’s just not the time. Can someone please try to help me calm down or tell me how early you tested positive after your first if you will have almost a 18 month gap between littles.