not to contradict you ConureHerder, but a Patron God or Matron Goddess isn't tied to nature and childbirth. [also The Morrigan is a 'darker' Goddess, it doesn't mean she's a patron God, if you work with The Morrigan she is your Patron Goddess] your Patron/Matron [patron=masculine, matron=feminine, though i don't think it matters much if you call one your Matron God and your Patron Goddess] is the deity you personally connect with, work with personally, and have a bond/connection with. you don't need one, but one might come to you one day.
you can look for one [i did] or you could wait for one to come to you when the times right, either way, just be open. should you seek out a patron deity, try doing some reflection, perhaps research deities associated with things you like, your family genealogy [say your family is from Greece, look into Greek mythology] or cultures you're interested in.