I don't understand, please read! ?

Hi, I'm 20, recently married in April DH is 22, 23 in December. After we were married, we couldn't wait to start TTC! But is proving a little bit of a challenge. ? however, when I was 16, 4 years ago, I was diagnosed with endometriosis. I had a surgery to hae to lesions removed from my uterus. And to my, and my dr's surprise, he found a cysts, which he also removed.  So now, here I am TTC. And I find myself getting frustrated with seeing younger girls (14-17) get pregnant so easily, friends, co workers, family, ect...I feel like I am the only woman on the planet who feels this way. Yes, I am happy for them, it's not a jealousy feeling, but I am frustrated. Any tips, to curve frustration? Does anyone else feel this way?