Trying to get wife pregnant

Troy • I`m 27 me and my will be married for one year on August 24 we been ttc now for a year
We been trying for a year  we even got the pre seed all her family and friends are getting pregnant  it been hard on  both of  is we been having sex ever other day like the dr say.  We both are kinda over lbs but we keep see over lbs people getting pregnant  any clue how to get her pregnant