Too Big, Too Fast...

Do you see this? The other day I was in the laundry room (which faces the downstairs bathroom) when I hear the toilet flush. So, I look up and this is what I see- he even got the little potty lid out from under the sink.

What?!? He just turned two (the other boys trained closer to 4). I am 34 weeks pregnant, I am so not ready for the potty training thing! He will take his diaper off and tell us he pooped-which really means pee, and he will strip his clothes and diaper off and bring me a diaper to put back on. He climbs on the pot a couple times a day, but so far it is only after he has already peed in his diaper. But still, he's getting it. So I have a conundrum, do I try to get him potty trained before baby comes, or just not push it and see how he does on his own? I guess I'm afraid if I do get his partially trained he'll regress when B4 comes. But still, it is pretty cute to see his tiny naked buns running around, except that I'm too big to want to chase him!