I feel so heartbroken 😭

So I just finished my period after my second CP and my sister in law just texted me her positive hpt this morning. They have only been trying for 2 months and shes already pregnant. My hubby and I have been trying for almost 3 years with a diagnosis of pcos, endo, pre cervical cancer and I just got diagnosed with Hypothyroidism last month. I just feel heartbroken that it happened so easily for them. Her and I are best friends so I’m trying to be happy for her but I feel like I’m breaking apart! Anyone have some advice on how I can just feel a little better??? I’m just not ok 😔