Super sad

I have been TTC for the past 4 months i was constantly checkin for ovulation and all and nothing.. I'm scared I'm either not working or infertil.. my friend just gave me the news that she's expecting.. and she wasn't even trying... Idk I'm really sad because im trying and nothing and she wasn't even trying and she got pregnant I'm super happy for her don't get me wrong just wish it was me.. Everyone around me is getting pregnant and here I am trying hard...