BFP!! Really?

How many times can I POAS (pee on a stick-in case you didn't know)? Four times so far is the answer. I still can't believe that the HPT is positive! We really weren't trying too hard. Just kind of doing whatever. And now here it is. We're expecting #3! Now what?
Maybe we didn't think this out very well. I'm now worrying about how we are going to cope with a third child. Our other two are still young (son-2.5 & daughter-1). Crazy aren't we?
I always knew I wanted my kids close in age because i hate to store all the baby things forever and I didn't want to buy everything again. But maybe we are having them too close. But then again I start thinking that we did start late. I'll be 34 this year. Most people I know with kids my kids ages are in their early 20s. That's why we don't belong to any play groups. I'd feel like a grandmother, lol.
Back to my current worry, how are we going to manage? Where are we going to put all the car seats? Where are we going to have all the kids sleep in the house? How are we ever going to be able to go anywhere?
Here's my thoughts:
carseats=We have a minivan. Currently the kiddos are in the middle row bucket seats and we have the rear row out to be able to put the double stroller back there. What we are thinking is replacing the rear row (goodbye stroller) and moving the two older kids back there and putting the new one in the middle row. We'll remove one middle row seat so that we can climb in and out of the back row to get the other two out. What fun! Not!
sleeping arrangements=The two kiddos sleep in the same room right now. It was a recent move. Sweet Pea was in our room until just about a month ago and she moved into Nert's room. It has been going okay. So I guess the new little one will go in our room. But after there, we don't know. Hopefully a new house, but that seems unlikely unless we hit the lottery.
going out=We always take the kids with us wherever we go. We haven't been out without the kids except maybe 4 times. We like taking them with us, but it would be nice to go somewhere without them (a date maybe). We have no babysitter. We don't trust too many people with our kids. And how do you advertise for a babysitter that you may only need for one day a month? And who in their right mind is going to choose to babysit them after we have the third?
Right now there is one for each of us to keep an eye on when we're out. I think having a third is going to be harder than going from one to two.
But we already love this one so I guess we'll work things out eventually.