working dilemma

Hi momzers. I've been a SAHM since my LO was 6months old.. now that he's 2yo, i think im ready to join the workforce again for various reasons (help hubby financially, we just bought a house, send LO to kindy, keep some for savings). But, also, since our LO is 2yo, my DH and I are planning for a 2nd one... but wouldn't it be bad to get back into the workforce and pregnant again, only to get maternity leave after 9months work? But if i wait, it'll be much harder for me to find a job, coz we're not getting younger ?.. Need advice, please...