What does cautiously optimistic even mean?

My numbers didn't double...they more than tripled! Almost quadrupled! So we're feeling good about that.

But that was three days ago. I need another test, and another. All to make sure this is really happening, that we're still in it. That our little embryo is a-ok. I need A LOT of reassurance. Because try as I might to just enjoy this moment, I'm cautious in my excitement. I have no symptoms to date (except missing my period). No sore boobs, no nausea, a little sleepiness but that may be due to the sudden absence of caffeine from my system...

I've read that symptoms often don't start until 6 weeks. It's so early. So, so early.

This is going to be the longest first trimester in the history of trimesters.