How long have you/were you ttc?

I’ve been trying for about 4 years now. I’ve only just started using ovulation tests, but feel like in the past 4 years it should have happened for us. Every month my period comes, a little bit of hope drops each time. Is there any positive stories you have to help keep that hope going a little longer? So many people around me (or on social media) are announcing pregnancies and births of their babies and I know it’s selfish but I’m extremely jealous every time. Sorry for the long post but I’m feeling quite hopeless at the moment.