Trying to get pregnant for like a little over a year now I'm not sure why I'm not pregnant yet its very depressing😞

Plz ladies help me!!!! My fiancee and I are trying to get pregnant and having no luck even after 14-15 months its very depressing!!! Not sure what to try or do I'm stuck.... We just bought a first response <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation tracker</a> anyone used this before have any tips ???? Just got off my period today!!! Really want a baby soon getting married in Oct10th of this year but it doesn't matter we want a baby ASAP.... Plz any help