I feel late

I married june 2013 and didnt want baby till last months. Then we started to think about it. Before that I didnt know anything about fertile days or ovulation or hardships of being ttc. My period is irregular and even glow couldnt say the exact day for ovu., it changes when my period starts suprisingly. Last time my period came 16 days late from the glows predicted starting period day. Made me hopeful for being pregnant and then big disappointment with AF.

Today I learned that my sister in law is pregnant at first attempt. They married last month. I am really happy for them but at the same time I feel like I was too late. Reading these long waitings of that ttc moms made me feel really upset and hopeless. As if I coldnt get BFP soon. By the way sister in law is 32 and Im 24. I know that I shouldnt feel that way but I wanted to share with somebody...