When should visit the doctor before ovulation, during ovulation, after ovution or period to check why im not getting pregnant?how much usually it cost

Any of the above: You should see a doctor, your obgyn or a reproductive medicine specialist if you have been trying for a year or longer, after 6 months if you are over 35 or have irregular periods. From there you doctor can figure out what testing you need and the appropriate treating options. The time you see him or her during the cycle for consultation does not matter. The cost depends on what you need.