TTC for more than 5 years!

Me and my husband have been TTC for a little over 5 years. Married for 6. 2 early miscarriages. We've been trying natural, only using prenatal, preseed,  and a healthy diet. I often think of trying out some infertility treatments and when I mention it to my doctor she says "well, you're still really young. Keep trying." I'm gonna be 28 this year... Which is still pretty young, but the closer I get to my 30's I feel like my chances get slimmer and slimmer!😩 I feel comfortable with my doctor but sometimes I don't feel like she's really hearing me! Would you switch doctors?