dont understand why we cant make our baby

Me and my husband have been ttc for 11 months me periods and normal and we know im ovulating regularly. we both went to doctor to get fertility test done last month and we both got a clear bill of health i started losing weight and so did he. we been eating healthy and pretty most stop drinking we even make life style change so that we lowered our stress we been enjoying each other having fun and even having a fun sex life i dont understand what could be stopping us from convining we are only 28 and 29. has anyone else been told they were healthy with no fertility issues and and took this long to get pregnant if so you how long did it take and what did you do differently to fanially get pregnant help share experiences. thank you ladies