Fertility Clinics

Does anyone know any fertility clinics in HOUSTON TX area that are not that expensive. My husband and I have been trying to get pregnant for 3 years already & nothing! I am not ready to give up trying. I am just fustrated that I am 25 yrs old & we just haven't been able to concieve. Very sad for me sometimes. I know God will bless us on his time with a healthy baby, I am not giving up faith. But I would really like to see what is the reason why we haven't been able to concieve. I have not went to the fertility  clinic because i hear alot of people say it is very expensive. Please ladies help with advice on what u have done to get pregnant? I have tried basically everything i can at home but has not worked. Thanks 🙌👏