No baby dust... yet

Lately I’ve been feeling down. I’ve been with my boyfriend for along time (five years) . We honestly never really wanted more kids outside of our own, but lately he’s wanting more. It’s just that since I had my daughter 10 years I haven’t gotten pregnant since then. It’s frustrating because Idk why I can’t get pregnant. Every dr says the same thing I’m not infertile, I’ve tried PreSeed and some other baby dance stuff, but huuuuuh nothing is working...... #justalilfrustrated