TTC baby #4

Emcee β€’ Married, I`m a Nurse; but a stay-at-home mom for now; 3 kids & trying to conceive my last baby #4
Why is is hard to get pregnant when you're planning; but when you aren't planning; you end up pregnant? πŸ˜’πŸ˜’πŸ˜’πŸ˜’πŸ˜’ 
I have 3 kids; none of them were planned....
But now that in planning on baby number 4 it's so hard to concieve 😩
Anyone else like that?