Trying To Get Pregnant

So I Was On Depo For Like 2 Years And I Got Off September 2015 So It Been About A Year I Been Off Of Depo, I Bee With My Bf For 3 Years We Tried But No Luck Every Time I Go To My Doctor To See Is The Depo Or Whatever Is Out My System They Say I'm Good I'm Ovulating But I Feel Like I Can Never Catch It, No I Do Not Have Kids But My Boyfriend Got Kids He Got Two His Youngest Is 13yrs So He Would Like Another One. So My Question Is Should We Go To A Fertility Center.? But I Really Am Trying To Avoid Going There. If Anybody Have Anything I Can Do At Home I Would Love To Hear The Suggests.