TTC FAILURE:(

so me n my husband have been together 4 5yrs since we was in high school me 19 n him 22 . while we r still young n both lead very successful lifes we want a family over r own. and have never used protection have tryed off n on 4 yrs 2 try n have a baby n nothing yet . starting 2 get very frustrating n sad . while everyone around use r building familys we still have been unfortunate :"( but I am always told by my family that im young 2 give it time I am starti g 2 worry and am leading toward going to the doctor but am not sure if I go to my obgyn or a specialist ? is anyone else going threw the same I need some type of support:(