TTC for 4 years

We have been trying for 4 years, pretty much when it happens it happens. But we figured we would have already been pregnant by now. Have been checked for hormones and ultrasound to make sure I was releasing eggs. I am. So they said I am still young(22 at the time) to keep trying and it will happen. (24 now) So now we are buckling down on Ovulation test and herbal teas and so on, and setting up an appointment to get further testing done. What else would y'all recommend?